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diff --git a/src/assets/viz/2/goog/html/safehtml.js b/src/assets/viz/2/goog/html/safehtml.js
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+// Copyright 2013 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+/**
+ * @fileoverview The SafeHtml type and its builders.
+ *
+ * TODO(xtof): Link to document stating type contract.
+ */
+
+goog.provide('goog.html.SafeHtml');
+
+goog.require('goog.array');
+goog.require('goog.asserts');
+goog.require('goog.dom.TagName');
+goog.require('goog.dom.tags');
+goog.require('goog.html.SafeScript');
+goog.require('goog.html.SafeStyle');
+goog.require('goog.html.SafeStyleSheet');
+goog.require('goog.html.SafeUrl');
+goog.require('goog.html.TrustedResourceUrl');
+goog.require('goog.i18n.bidi.Dir');
+goog.require('goog.i18n.bidi.DirectionalString');
+goog.require('goog.labs.userAgent.browser');
+goog.require('goog.object');
+goog.require('goog.string');
+goog.require('goog.string.Const');
+goog.require('goog.string.TypedString');
+
+
+
+/**
+ * A string that is safe to use in HTML context in DOM APIs and HTML documents.
+ *
+ * A SafeHtml is a string-like object that carries the security type contract
+ * that its value as a string will not cause untrusted script execution when
+ * evaluated as HTML in a browser.
+ *
+ * Values of this type are guaranteed to be safe to use in HTML contexts,
+ * such as, assignment to the innerHTML DOM property, or interpolation into
+ * a HTML template in HTML PC_DATA context, in the sense that the use will not
+ * result in a Cross-Site-Scripting vulnerability.
+ *
+ * Instances of this type must be created via the factory methods
+ * ({@code goog.html.SafeHtml.create}, {@code goog.html.SafeHtml.htmlEscape}),
+ * etc and not by invoking its constructor.  The constructor intentionally
+ * takes no parameters and the type is immutable; hence only a default instance
+ * corresponding to the empty string can be obtained via constructor invocation.
+ *
+ * @see goog.html.SafeHtml#create
+ * @see goog.html.SafeHtml#htmlEscape
+ * @constructor
+ * @final
+ * @struct
+ * @implements {goog.i18n.bidi.DirectionalString}
+ * @implements {goog.string.TypedString}
+ */
+goog.html.SafeHtml = function() {
+  /**
+   * The contained value of this SafeHtml.  The field has a purposely ugly
+   * name to make (non-compiled) code that attempts to directly access this
+   * field stand out.
+   * @private {string}
+   */
+  this.privateDoNotAccessOrElseSafeHtmlWrappedValue_ = '';
+
+  /**
+   * A type marker used to implement additional run-time type checking.
+   * @see goog.html.SafeHtml#unwrap
+   * @const {!Object}
+   * @private
+   */
+  this.SAFE_HTML_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ =
+      goog.html.SafeHtml.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_;
+
+  /**
+   * This SafeHtml's directionality, or null if unknown.
+   * @private {?goog.i18n.bidi.Dir}
+   */
+  this.dir_ = null;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.SafeHtml.prototype.implementsGoogI18nBidiDirectionalString = true;
+
+
+/** @override */
+goog.html.SafeHtml.prototype.getDirection = function() {
+  return this.dir_;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.SafeHtml.prototype.implementsGoogStringTypedString = true;
+
+
+/**
+ * Returns this SafeHtml's value as string.
+ *
+ * IMPORTANT: In code where it is security relevant that an object's type is
+ * indeed {@code SafeHtml}, use {@code goog.html.SafeHtml.unwrap} instead of
+ * this method. If in doubt, assume that it's security relevant. In particular,
+ * note that goog.html functions which return a goog.html type do not guarantee
+ * that the returned instance is of the right type. For example:
+ *
+ * <pre>
+ * var fakeSafeHtml = new String('fake');
+ * fakeSafeHtml.__proto__ = goog.html.SafeHtml.prototype;
+ * var newSafeHtml = goog.html.SafeHtml.htmlEscape(fakeSafeHtml);
+ * // newSafeHtml is just an alias for fakeSafeHtml, it's passed through by
+ * // goog.html.SafeHtml.htmlEscape() as fakeSafeHtml
+ * // instanceof goog.html.SafeHtml.
+ * </pre>
+ *
+ * @see goog.html.SafeHtml#unwrap
+ * @override
+ */
+goog.html.SafeHtml.prototype.getTypedStringValue = function() {
+  return this.privateDoNotAccessOrElseSafeHtmlWrappedValue_;
+};
+
+
+if (goog.DEBUG) {
+  /**
+   * Returns a debug string-representation of this value.
+   *
+   * To obtain the actual string value wrapped in a SafeHtml, use
+   * {@code goog.html.SafeHtml.unwrap}.
+   *
+   * @see goog.html.SafeHtml#unwrap
+   * @override
+   */
+  goog.html.SafeHtml.prototype.toString = function() {
+    return 'SafeHtml{' + this.privateDoNotAccessOrElseSafeHtmlWrappedValue_ +
+        '}';
+  };
+}
+
+
+/**
+ * Performs a runtime check that the provided object is indeed a SafeHtml
+ * object, and returns its value.
+ * @param {!goog.html.SafeHtml} safeHtml The object to extract from.
+ * @return {string} The SafeHtml object's contained string, unless the run-time
+ *     type check fails. In that case, {@code unwrap} returns an innocuous
+ *     string, or, if assertions are enabled, throws
+ *     {@code goog.asserts.AssertionError}.
+ */
+goog.html.SafeHtml.unwrap = function(safeHtml) {
+  // Perform additional run-time type-checking to ensure that safeHtml is indeed
+  // an instance of the expected type.  This provides some additional protection
+  // against security bugs due to application code that disables type checks.
+  // Specifically, the following checks are performed:
+  // 1. The object is an instance of the expected type.
+  // 2. The object is not an instance of a subclass.
+  // 3. The object carries a type marker for the expected type. "Faking" an
+  // object requires a reference to the type marker, which has names intended
+  // to stand out in code reviews.
+  if (safeHtml instanceof goog.html.SafeHtml &&
+      safeHtml.constructor === goog.html.SafeHtml &&
+      safeHtml.SAFE_HTML_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ ===
+          goog.html.SafeHtml.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_) {
+    return safeHtml.privateDoNotAccessOrElseSafeHtmlWrappedValue_;
+  } else {
+    goog.asserts.fail('expected object of type SafeHtml, got \'' +
+        safeHtml + '\' of type ' + goog.typeOf(safeHtml));
+    return 'type_error:SafeHtml';
+  }
+};
+
+
+/**
+ * Shorthand for union of types that can sensibly be converted to strings
+ * or might already be SafeHtml (as SafeHtml is a goog.string.TypedString).
+ * @private
+ * @typedef {string|number|boolean|!goog.string.TypedString|
+ *           !goog.i18n.bidi.DirectionalString}
+ */
+goog.html.SafeHtml.TextOrHtml_;
+
+
+/**
+ * Returns HTML-escaped text as a SafeHtml object.
+ *
+ * If text is of a type that implements
+ * {@code goog.i18n.bidi.DirectionalString}, the directionality of the new
+ * {@code SafeHtml} object is set to {@code text}'s directionality, if known.
+ * Otherwise, the directionality of the resulting SafeHtml is unknown (i.e.,
+ * {@code null}).
+ *
+ * @param {!goog.html.SafeHtml.TextOrHtml_} textOrHtml The text to escape. If
+ *     the parameter is of type SafeHtml it is returned directly (no escaping
+ *     is done).
+ * @return {!goog.html.SafeHtml} The escaped text, wrapped as a SafeHtml.
+ */
+goog.html.SafeHtml.htmlEscape = function(textOrHtml) {
+  if (textOrHtml instanceof goog.html.SafeHtml) {
+    return textOrHtml;
+  }
+  var dir = null;
+  if (textOrHtml.implementsGoogI18nBidiDirectionalString) {
+    dir = textOrHtml.getDirection();
+  }
+  var textAsString;
+  if (textOrHtml.implementsGoogStringTypedString) {
+    textAsString = textOrHtml.getTypedStringValue();
+  } else {
+    textAsString = String(textOrHtml);
+  }
+  return goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+      goog.string.htmlEscape(textAsString), dir);
+};
+
+
+/**
+ * Returns HTML-escaped text as a SafeHtml object, with newlines changed to
+ * &lt;br&gt;.
+ * @param {!goog.html.SafeHtml.TextOrHtml_} textOrHtml The text to escape. If
+ *     the parameter is of type SafeHtml it is returned directly (no escaping
+ *     is done).
+ * @return {!goog.html.SafeHtml} The escaped text, wrapped as a SafeHtml.
+ */
+goog.html.SafeHtml.htmlEscapePreservingNewlines = function(textOrHtml) {
+  if (textOrHtml instanceof goog.html.SafeHtml) {
+    return textOrHtml;
+  }
+  var html = goog.html.SafeHtml.htmlEscape(textOrHtml);
+  return goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+      goog.string.newLineToBr(goog.html.SafeHtml.unwrap(html)),
+      html.getDirection());
+};
+
+
+/**
+ * Returns HTML-escaped text as a SafeHtml object, with newlines changed to
+ * &lt;br&gt; and escaping whitespace to preserve spatial formatting. Character
+ * entity #160 is used to make it safer for XML.
+ * @param {!goog.html.SafeHtml.TextOrHtml_} textOrHtml The text to escape. If
+ *     the parameter is of type SafeHtml it is returned directly (no escaping
+ *     is done).
+ * @return {!goog.html.SafeHtml} The escaped text, wrapped as a SafeHtml.
+ */
+goog.html.SafeHtml.htmlEscapePreservingNewlinesAndSpaces = function(
+    textOrHtml) {
+  if (textOrHtml instanceof goog.html.SafeHtml) {
+    return textOrHtml;
+  }
+  var html = goog.html.SafeHtml.htmlEscape(textOrHtml);
+  return goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+      goog.string.whitespaceEscape(goog.html.SafeHtml.unwrap(html)),
+      html.getDirection());
+};
+
+
+/**
+ * Coerces an arbitrary object into a SafeHtml object.
+ *
+ * If {@code textOrHtml} is already of type {@code goog.html.SafeHtml}, the same
+ * object is returned. Otherwise, {@code textOrHtml} is coerced to string, and
+ * HTML-escaped. If {@code textOrHtml} is of a type that implements
+ * {@code goog.i18n.bidi.DirectionalString}, its directionality, if known, is
+ * preserved.
+ *
+ * @param {!goog.html.SafeHtml.TextOrHtml_} textOrHtml The text or SafeHtml to
+ *     coerce.
+ * @return {!goog.html.SafeHtml} The resulting SafeHtml object.
+ * @deprecated Use goog.html.SafeHtml.htmlEscape.
+ */
+goog.html.SafeHtml.from = goog.html.SafeHtml.htmlEscape;
+
+
+/**
+ * @const
+ * @private
+ */
+goog.html.SafeHtml.VALID_NAMES_IN_TAG_ = /^[a-zA-Z0-9-]+$/;
+
+
+/**
+ * Set of attributes containing URL as defined at
+ * http://www.w3.org/TR/html5/index.html#attributes-1.
+ * @private @const {!Object<string,boolean>}
+ */
+goog.html.SafeHtml.URL_ATTRIBUTES_ = goog.object.createSet(
+    'action', 'cite', 'data', 'formaction', 'href', 'manifest', 'poster',
+    'src');
+
+
+/**
+ * Tags which are unsupported via create(). They might be supported via a
+ * tag-specific create method. These are tags which might require a
+ * TrustedResourceUrl in one of their attributes or a restricted type for
+ * their content.
+ * @private @const {!Object<string,boolean>}
+ */
+goog.html.SafeHtml.NOT_ALLOWED_TAG_NAMES_ = goog.object.createSet(
+    goog.dom.TagName.APPLET, goog.dom.TagName.BASE, goog.dom.TagName.EMBED,
+    goog.dom.TagName.IFRAME, goog.dom.TagName.LINK, goog.dom.TagName.MATH,
+    goog.dom.TagName.META, goog.dom.TagName.OBJECT, goog.dom.TagName.SCRIPT,
+    goog.dom.TagName.STYLE, goog.dom.TagName.SVG, goog.dom.TagName.TEMPLATE);
+
+
+/**
+ * @typedef {string|number|goog.string.TypedString|
+ *     goog.html.SafeStyle.PropertyMap|undefined}
+ */
+goog.html.SafeHtml.AttributeValue;
+
+
+/**
+ * Creates a SafeHtml content consisting of a tag with optional attributes and
+ * optional content.
+ *
+ * For convenience tag names and attribute names are accepted as regular
+ * strings, instead of goog.string.Const. Nevertheless, you should not pass
+ * user-controlled values to these parameters. Note that these parameters are
+ * syntactically validated at runtime, and invalid values will result in
+ * an exception.
+ *
+ * Example usage:
+ *
+ * goog.html.SafeHtml.create('br');
+ * goog.html.SafeHtml.create('div', {'class': 'a'});
+ * goog.html.SafeHtml.create('p', {}, 'a');
+ * goog.html.SafeHtml.create('p', {}, goog.html.SafeHtml.create('br'));
+ *
+ * goog.html.SafeHtml.create('span', {
+ *   'style': {'margin': '0'}
+ * });
+ *
+ * To guarantee SafeHtml's type contract is upheld there are restrictions on
+ * attribute values and tag names.
+ *
+ * - For attributes which contain script code (on*), a goog.string.Const is
+ *   required.
+ * - For attributes which contain style (style), a goog.html.SafeStyle or a
+ *   goog.html.SafeStyle.PropertyMap is required.
+ * - For attributes which are interpreted as URLs (e.g. src, href) a
+ *   goog.html.SafeUrl, goog.string.Const or string is required. If a string
+ *   is passed, it will be sanitized with SafeUrl.sanitize().
+ * - For tags which can load code or set security relevant page metadata,
+ *   more specific goog.html.SafeHtml.create*() functions must be used. Tags
+ *   which are not supported by this function are applet, base, embed, iframe,
+ *   link, math, object, script, style, svg, and template.
+ *
+ * @param {!goog.dom.TagName|string} tagName The name of the tag. Only tag names
+ *     consisting of [a-zA-Z0-9-] are allowed. Tag names documented above are
+ *     disallowed.
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ *     Mapping from attribute names to their values. Only attribute names
+ *     consisting of [a-zA-Z0-9-] are allowed. Value of null or undefined causes
+ *     the attribute to be omitted.
+ * @param {!goog.html.SafeHtml.TextOrHtml_|
+ *     !Array<!goog.html.SafeHtml.TextOrHtml_>=} opt_content Content to
+ *     HTML-escape and put inside the tag. This must be empty for void tags
+ *     like <br>. Array elements are concatenated.
+ * @return {!goog.html.SafeHtml} The SafeHtml content with the tag.
+ * @throws {Error} If invalid tag name, attribute name, or attribute value is
+ *     provided.
+ * @throws {goog.asserts.AssertionError} If content for void tag is provided.
+ */
+goog.html.SafeHtml.create = function(tagName, opt_attributes, opt_content) {
+  goog.html.SafeHtml.verifyTagName(String(tagName));
+  return goog.html.SafeHtml.createSafeHtmlTagSecurityPrivateDoNotAccessOrElse(
+      String(tagName), opt_attributes, opt_content);
+};
+
+
+/**
+ * Verifies if the tag name is valid and if it doesn't change the context.
+ * E.g. STRONG is fine but SCRIPT throws because it changes context. See
+ * goog.html.SafeHtml.create for an explanation of allowed tags.
+ * @param {string} tagName
+ * @throws {Error} If invalid tag name is provided.
+ * @package
+ */
+goog.html.SafeHtml.verifyTagName = function(tagName) {
+  if (!goog.html.SafeHtml.VALID_NAMES_IN_TAG_.test(tagName)) {
+    throw Error('Invalid tag name <' + tagName + '>.');
+  }
+  if (tagName.toUpperCase() in goog.html.SafeHtml.NOT_ALLOWED_TAG_NAMES_) {
+    throw Error('Tag name <' + tagName + '> is not allowed for SafeHtml.');
+  }
+};
+
+
+/**
+ * Creates a SafeHtml representing an iframe tag.
+ *
+ * This by default restricts the iframe as much as possible by setting the
+ * sandbox attribute to the empty string. If the iframe requires less
+ * restrictions, set the sandbox attribute as tight as possible, but do not rely
+ * on the sandbox as a security feature because it is not supported by older
+ * browsers. If a sandbox is essential to security (e.g. for third-party
+ * frames), use createSandboxIframe which checks for browser support.
+ *
+ * @see https://developer.mozilla.org/en/docs/Web/HTML/Element/iframe#attr-sandbox
+ *
+ * @param {?goog.html.TrustedResourceUrl=} opt_src The value of the src
+ *     attribute. If null or undefined src will not be set.
+ * @param {?goog.html.SafeHtml=} opt_srcdoc The value of the srcdoc attribute.
+ *     If null or undefined srcdoc will not be set.
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ *     Mapping from attribute names to their values. Only attribute names
+ *     consisting of [a-zA-Z0-9-] are allowed. Value of null or undefined causes
+ *     the attribute to be omitted.
+ * @param {!goog.html.SafeHtml.TextOrHtml_|
+ *     !Array<!goog.html.SafeHtml.TextOrHtml_>=} opt_content Content to
+ *     HTML-escape and put inside the tag. Array elements are concatenated.
+ * @return {!goog.html.SafeHtml} The SafeHtml content with the tag.
+ * @throws {Error} If invalid tag name, attribute name, or attribute value is
+ *     provided. If opt_attributes contains the src or srcdoc attributes.
+ */
+goog.html.SafeHtml.createIframe = function(
+    opt_src, opt_srcdoc, opt_attributes, opt_content) {
+  if (opt_src) {
+    // Check whether this is really TrustedResourceUrl.
+    goog.html.TrustedResourceUrl.unwrap(opt_src);
+  }
+
+  var fixedAttributes = {};
+  fixedAttributes['src'] = opt_src || null;
+  fixedAttributes['srcdoc'] =
+      opt_srcdoc && goog.html.SafeHtml.unwrap(opt_srcdoc);
+  var defaultAttributes = {'sandbox': ''};
+  var attributes = goog.html.SafeHtml.combineAttributes(
+      fixedAttributes, defaultAttributes, opt_attributes);
+  return goog.html.SafeHtml.createSafeHtmlTagSecurityPrivateDoNotAccessOrElse(
+      'iframe', attributes, opt_content);
+};
+
+
+/**
+ * Creates a SafeHtml representing a sandboxed iframe tag.
+ *
+ * The sandbox attribute is enforced in its most restrictive mode, an empty
+ * string. Consequently, the security requirements for the src and srcdoc
+ * attributes are relaxed compared to SafeHtml.createIframe. This function
+ * will throw on browsers that do not support the sandbox attribute, as
+ * determined by SafeHtml.canUseSandboxIframe.
+ *
+ * The SafeHtml returned by this function can trigger downloads with no
+ * user interaction on Chrome (though only a few, further attempts are blocked).
+ * Firefox and IE will block all downloads from the sandbox.
+ *
+ * @see https://developer.mozilla.org/en/docs/Web/HTML/Element/iframe#attr-sandbox
+ * @see https://lists.w3.org/Archives/Public/public-whatwg-archive/2013Feb/0112.html
+ *
+ * @param {string|!goog.html.SafeUrl=} opt_src The value of the src
+ *     attribute. If null or undefined src will not be set.
+ * @param {string=} opt_srcdoc The value of the srcdoc attribute.
+ *     If null or undefined srcdoc will not be set. Will not be sanitized.
+ * @param {!Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ *     Mapping from attribute names to their values. Only attribute names
+ *     consisting of [a-zA-Z0-9-] are allowed. Value of null or undefined causes
+ *     the attribute to be omitted.
+ * @param {!goog.html.SafeHtml.TextOrHtml_|
+ *     !Array<!goog.html.SafeHtml.TextOrHtml_>=} opt_content Content to
+ *     HTML-escape and put inside the tag. Array elements are concatenated.
+ * @return {!goog.html.SafeHtml} The SafeHtml content with the tag.
+ * @throws {Error} If invalid tag name, attribute name, or attribute value is
+ *     provided. If opt_attributes contains the src, srcdoc or sandbox
+ *     attributes. If browser does not support the sandbox attribute on iframe.
+ */
+goog.html.SafeHtml.createSandboxIframe = function(
+    opt_src, opt_srcdoc, opt_attributes, opt_content) {
+  if (!goog.html.SafeHtml.canUseSandboxIframe()) {
+    throw new Error('The browser does not support sandboxed iframes.');
+  }
+
+  var fixedAttributes = {};
+  if (opt_src) {
+    // Note that sanitize is a no-op on SafeUrl.
+    fixedAttributes['src'] =
+        goog.html.SafeUrl.unwrap(goog.html.SafeUrl.sanitize(opt_src));
+  } else {
+    fixedAttributes['src'] = null;
+  }
+  fixedAttributes['srcdoc'] = opt_srcdoc || null;
+  fixedAttributes['sandbox'] = '';
+  var attributes =
+      goog.html.SafeHtml.combineAttributes(fixedAttributes, {}, opt_attributes);
+  return goog.html.SafeHtml.createSafeHtmlTagSecurityPrivateDoNotAccessOrElse(
+      'iframe', attributes, opt_content);
+};
+
+
+/**
+ * Checks if the user agent supports sandboxed iframes.
+ * @return {boolean}
+ */
+goog.html.SafeHtml.canUseSandboxIframe = function() {
+  return goog.global['HTMLIFrameElement'] &&
+      ('sandbox' in goog.global['HTMLIFrameElement'].prototype);
+};
+
+
+/**
+ * Creates a SafeHtml representing a script tag with the src attribute.
+ * @param {!goog.html.TrustedResourceUrl} src The value of the src
+ * attribute.
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=}
+ * opt_attributes
+ *     Mapping from attribute names to their values. Only attribute names
+ *     consisting of [a-zA-Z0-9-] are allowed. Value of null or undefined
+ *     causes the attribute to be omitted.
+ * @return {!goog.html.SafeHtml} The SafeHtml content with the tag.
+ * @throws {Error} If invalid attribute name or value is provided. If
+ *     opt_attributes contains the src attribute.
+ */
+goog.html.SafeHtml.createScriptSrc = function(src, opt_attributes) {
+  // TODO(mlourenco): The charset attribute should probably be blocked. If
+  // its value is attacker controlled, the script contains attacker controlled
+  // sub-strings (even if properly escaped) and the server does not set charset
+  // then XSS is likely possible.
+  // https://html.spec.whatwg.org/multipage/scripting.html#dom-script-charset
+
+  // Check whether this is really TrustedResourceUrl.
+  goog.html.TrustedResourceUrl.unwrap(src);
+
+  var fixedAttributes = {'src': src};
+  var defaultAttributes = {};
+  var attributes = goog.html.SafeHtml.combineAttributes(
+      fixedAttributes, defaultAttributes, opt_attributes);
+  return goog.html.SafeHtml.createSafeHtmlTagSecurityPrivateDoNotAccessOrElse(
+      'script', attributes);
+};
+
+
+/**
+ * Creates a SafeHtml representing a script tag. Does not allow the language,
+ * src, text or type attributes to be set.
+ * @param {!goog.html.SafeScript|!Array<!goog.html.SafeScript>}
+ *     script Content to put inside the tag. Array elements are
+ *     concatenated.
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ *     Mapping from attribute names to their values. Only attribute names
+ *     consisting of [a-zA-Z0-9-] are allowed. Value of null or undefined causes
+ *     the attribute to be omitted.
+ * @return {!goog.html.SafeHtml} The SafeHtml content with the tag.
+ * @throws {Error} If invalid attribute name or attribute value is provided. If
+ *     opt_attributes contains the language, src, text or type attribute.
+ */
+goog.html.SafeHtml.createScript = function(script, opt_attributes) {
+  for (var attr in opt_attributes) {
+    var attrLower = attr.toLowerCase();
+    if (attrLower == 'language' || attrLower == 'src' || attrLower == 'text' ||
+        attrLower == 'type') {
+      throw Error('Cannot set "' + attrLower + '" attribute');
+    }
+  }
+
+  var content = '';
+  script = goog.array.concat(script);
+  for (var i = 0; i < script.length; i++) {
+    content += goog.html.SafeScript.unwrap(script[i]);
+  }
+  // Convert to SafeHtml so that it's not HTML-escaped. This is safe because
+  // as part of its contract, SafeScript should have no dangerous '<'.
+  var htmlContent =
+      goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+          content, goog.i18n.bidi.Dir.NEUTRAL);
+  return goog.html.SafeHtml.createSafeHtmlTagSecurityPrivateDoNotAccessOrElse(
+      'script', opt_attributes, htmlContent);
+};
+
+
+/**
+ * Creates a SafeHtml representing a style tag. The type attribute is set
+ * to "text/css".
+ * @param {!goog.html.SafeStyleSheet|!Array<!goog.html.SafeStyleSheet>}
+ *     styleSheet Content to put inside the tag. Array elements are
+ *     concatenated.
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ *     Mapping from attribute names to their values. Only attribute names
+ *     consisting of [a-zA-Z0-9-] are allowed. Value of null or undefined causes
+ *     the attribute to be omitted.
+ * @return {!goog.html.SafeHtml} The SafeHtml content with the tag.
+ * @throws {Error} If invalid attribute name or attribute value is provided. If
+ *     opt_attributes contains the type attribute.
+ */
+goog.html.SafeHtml.createStyle = function(styleSheet, opt_attributes) {
+  var fixedAttributes = {'type': 'text/css'};
+  var defaultAttributes = {};
+  var attributes = goog.html.SafeHtml.combineAttributes(
+      fixedAttributes, defaultAttributes, opt_attributes);
+
+  var content = '';
+  styleSheet = goog.array.concat(styleSheet);
+  for (var i = 0; i < styleSheet.length; i++) {
+    content += goog.html.SafeStyleSheet.unwrap(styleSheet[i]);
+  }
+  // Convert to SafeHtml so that it's not HTML-escaped. This is safe because
+  // as part of its contract, SafeStyleSheet should have no dangerous '<'.
+  var htmlContent =
+      goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+          content, goog.i18n.bidi.Dir.NEUTRAL);
+  return goog.html.SafeHtml.createSafeHtmlTagSecurityPrivateDoNotAccessOrElse(
+      'style', attributes, htmlContent);
+};
+
+
+/**
+ * Creates a SafeHtml representing a meta refresh tag.
+ * @param {!goog.html.SafeUrl|string} url Where to redirect. If a string is
+ *     passed, it will be sanitized with SafeUrl.sanitize().
+ * @param {number=} opt_secs Number of seconds until the page should be
+ *     reloaded. Will be set to 0 if unspecified.
+ * @return {!goog.html.SafeHtml} The SafeHtml content with the tag.
+ */
+goog.html.SafeHtml.createMetaRefresh = function(url, opt_secs) {
+
+  // Note that sanitize is a no-op on SafeUrl.
+  var unwrappedUrl = goog.html.SafeUrl.unwrap(goog.html.SafeUrl.sanitize(url));
+
+  if (goog.labs.userAgent.browser.isIE() ||
+      goog.labs.userAgent.browser.isEdge()) {
+    // IE/EDGE can't parse the content attribute if the url contains a
+    // semicolon. We can fix this by adding quotes around the url, but then we
+    // can't parse quotes in the URL correctly. Also, it seems that IE/EDGE
+    // did not unescape semicolons in these URLs at some point in the past. We
+    // take a best-effort approach.
+    //
+    // If the URL has semicolons (which may happen in some cases, see
+    // http://www.w3.org/TR/1999/REC-html401-19991224/appendix/notes.html#h-B.2
+    // for instance), wrap it in single quotes to protect the semicolons.
+    // If the URL has semicolons and single quotes, url-encode the single quotes
+    // as well.
+    //
+    // This is imperfect. Notice that both ' and ; are reserved characters in
+    // URIs, so this could do the wrong thing, but at least it will do the wrong
+    // thing in only rare cases.
+    if (goog.string.contains(unwrappedUrl, ';')) {
+      unwrappedUrl = "'" + unwrappedUrl.replace(/'/g, '%27') + "'";
+    }
+  }
+  var attributes = {
+    'http-equiv': 'refresh',
+    'content': (opt_secs || 0) + '; url=' + unwrappedUrl
+  };
+
+  // This function will handle the HTML escaping for attributes.
+  return goog.html.SafeHtml.createSafeHtmlTagSecurityPrivateDoNotAccessOrElse(
+      'meta', attributes);
+};
+
+
+/**
+ * @param {string} tagName The tag name.
+ * @param {string} name The attribute name.
+ * @param {!goog.html.SafeHtml.AttributeValue} value The attribute value.
+ * @return {string} A "name=value" string.
+ * @throws {Error} If attribute value is unsafe for the given tag and attribute.
+ * @private
+ */
+goog.html.SafeHtml.getAttrNameAndValue_ = function(tagName, name, value) {
+  // If it's goog.string.Const, allow any valid attribute name.
+  if (value instanceof goog.string.Const) {
+    value = goog.string.Const.unwrap(value);
+  } else if (name.toLowerCase() == 'style') {
+    value = goog.html.SafeHtml.getStyleValue_(value);
+  } else if (/^on/i.test(name)) {
+    // TODO(jakubvrana): Disallow more attributes with a special meaning.
+    throw Error(
+        'Attribute "' + name + '" requires goog.string.Const value, "' + value +
+        '" given.');
+    // URL attributes handled differently according to tag.
+  } else if (name.toLowerCase() in goog.html.SafeHtml.URL_ATTRIBUTES_) {
+    if (value instanceof goog.html.TrustedResourceUrl) {
+      value = goog.html.TrustedResourceUrl.unwrap(value);
+    } else if (value instanceof goog.html.SafeUrl) {
+      value = goog.html.SafeUrl.unwrap(value);
+    } else if (goog.isString(value)) {
+      value = goog.html.SafeUrl.sanitize(value).getTypedStringValue();
+    } else {
+      throw Error(
+          'Attribute "' + name + '" on tag "' + tagName +
+          '" requires goog.html.SafeUrl, goog.string.Const, or string,' +
+          ' value "' + value + '" given.');
+    }
+  }
+
+  // Accept SafeUrl, TrustedResourceUrl, etc. for attributes which only require
+  // HTML-escaping.
+  if (value.implementsGoogStringTypedString) {
+    // Ok to call getTypedStringValue() since there's no reliance on the type
+    // contract for security here.
+    value = value.getTypedStringValue();
+  }
+
+  goog.asserts.assert(
+      goog.isString(value) || goog.isNumber(value),
+      'String or number value expected, got ' + (typeof value) +
+          ' with value: ' + value);
+  return name + '="' + goog.string.htmlEscape(String(value)) + '"';
+};
+
+
+/**
+ * Gets value allowed in "style" attribute.
+ * @param {!goog.html.SafeHtml.AttributeValue} value It could be SafeStyle or a
+ *     map which will be passed to goog.html.SafeStyle.create.
+ * @return {string} Unwrapped value.
+ * @throws {Error} If string value is given.
+ * @private
+ */
+goog.html.SafeHtml.getStyleValue_ = function(value) {
+  if (!goog.isObject(value)) {
+    throw Error(
+        'The "style" attribute requires goog.html.SafeStyle or map ' +
+        'of style properties, ' + (typeof value) + ' given: ' + value);
+  }
+  if (!(value instanceof goog.html.SafeStyle)) {
+    // Process the property bag into a style object.
+    value = goog.html.SafeStyle.create(value);
+  }
+  return goog.html.SafeStyle.unwrap(value);
+};
+
+
+/**
+ * Creates a SafeHtml content with known directionality consisting of a tag with
+ * optional attributes and optional content.
+ * @param {!goog.i18n.bidi.Dir} dir Directionality.
+ * @param {string} tagName
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ * @param {!goog.html.SafeHtml.TextOrHtml_|
+ *     !Array<!goog.html.SafeHtml.TextOrHtml_>=} opt_content
+ * @return {!goog.html.SafeHtml} The SafeHtml content with the tag.
+ */
+goog.html.SafeHtml.createWithDir = function(
+    dir, tagName, opt_attributes, opt_content) {
+  var html = goog.html.SafeHtml.create(tagName, opt_attributes, opt_content);
+  html.dir_ = dir;
+  return html;
+};
+
+
+/**
+ * Creates a new SafeHtml object by concatenating values.
+ * @param {...(!goog.html.SafeHtml.TextOrHtml_|
+ *     !Array<!goog.html.SafeHtml.TextOrHtml_>)} var_args Values to concatenate.
+ * @return {!goog.html.SafeHtml}
+ */
+goog.html.SafeHtml.concat = function(var_args) {
+  var dir = goog.i18n.bidi.Dir.NEUTRAL;
+  var content = '';
+
+  /**
+   * @param {!goog.html.SafeHtml.TextOrHtml_|
+   *     !Array<!goog.html.SafeHtml.TextOrHtml_>} argument
+   */
+  var addArgument = function(argument) {
+    if (goog.isArray(argument)) {
+      goog.array.forEach(argument, addArgument);
+    } else {
+      var html = goog.html.SafeHtml.htmlEscape(argument);
+      content += goog.html.SafeHtml.unwrap(html);
+      var htmlDir = html.getDirection();
+      if (dir == goog.i18n.bidi.Dir.NEUTRAL) {
+        dir = htmlDir;
+      } else if (htmlDir != goog.i18n.bidi.Dir.NEUTRAL && dir != htmlDir) {
+        dir = null;
+      }
+    }
+  };
+
+  goog.array.forEach(arguments, addArgument);
+  return goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+      content, dir);
+};
+
+
+/**
+ * Creates a new SafeHtml object with known directionality by concatenating the
+ * values.
+ * @param {!goog.i18n.bidi.Dir} dir Directionality.
+ * @param {...(!goog.html.SafeHtml.TextOrHtml_|
+ *     !Array<!goog.html.SafeHtml.TextOrHtml_>)} var_args Elements of array
+ *     arguments would be processed recursively.
+ * @return {!goog.html.SafeHtml}
+ */
+goog.html.SafeHtml.concatWithDir = function(dir, var_args) {
+  var html = goog.html.SafeHtml.concat(goog.array.slice(arguments, 1));
+  html.dir_ = dir;
+  return html;
+};
+
+
+/**
+ * Type marker for the SafeHtml type, used to implement additional run-time
+ * type checking.
+ * @const {!Object}
+ * @private
+ */
+goog.html.SafeHtml.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ = {};
+
+
+/**
+ * Package-internal utility method to create SafeHtml instances.
+ *
+ * @param {string} html The string to initialize the SafeHtml object with.
+ * @param {?goog.i18n.bidi.Dir} dir The directionality of the SafeHtml to be
+ *     constructed, or null if unknown.
+ * @return {!goog.html.SafeHtml} The initialized SafeHtml object.
+ * @package
+ */
+goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse = function(
+    html, dir) {
+  return new goog.html.SafeHtml().initSecurityPrivateDoNotAccessOrElse_(
+      html, dir);
+};
+
+
+/**
+ * Called from createSafeHtmlSecurityPrivateDoNotAccessOrElse(). This
+ * method exists only so that the compiler can dead code eliminate static
+ * fields (like EMPTY) when they're not accessed.
+ * @param {string} html
+ * @param {?goog.i18n.bidi.Dir} dir
+ * @return {!goog.html.SafeHtml}
+ * @private
+ */
+goog.html.SafeHtml.prototype.initSecurityPrivateDoNotAccessOrElse_ = function(
+    html, dir) {
+  this.privateDoNotAccessOrElseSafeHtmlWrappedValue_ = html;
+  this.dir_ = dir;
+  return this;
+};
+
+
+/**
+ * Like create() but does not restrict which tags can be constructed.
+ *
+ * @param {string} tagName Tag name. Set or validated by caller.
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ * @param {(!goog.html.SafeHtml.TextOrHtml_|
+ *     !Array<!goog.html.SafeHtml.TextOrHtml_>)=} opt_content
+ * @return {!goog.html.SafeHtml}
+ * @throws {Error} If invalid or unsafe attribute name or value is provided.
+ * @throws {goog.asserts.AssertionError} If content for void tag is provided.
+ * @package
+ */
+goog.html.SafeHtml.createSafeHtmlTagSecurityPrivateDoNotAccessOrElse = function(
+    tagName, opt_attributes, opt_content) {
+  var dir = null;
+  var result = '<' + tagName;
+  result += goog.html.SafeHtml.stringifyAttributes(tagName, opt_attributes);
+
+  var content = opt_content;
+  if (!goog.isDefAndNotNull(content)) {
+    content = [];
+  } else if (!goog.isArray(content)) {
+    content = [content];
+  }
+
+  if (goog.dom.tags.isVoidTag(tagName.toLowerCase())) {
+    goog.asserts.assert(
+        !content.length, 'Void tag <' + tagName + '> does not allow content.');
+    result += '>';
+  } else {
+    var html = goog.html.SafeHtml.concat(content);
+    result += '>' + goog.html.SafeHtml.unwrap(html) + '</' + tagName + '>';
+    dir = html.getDirection();
+  }
+
+  var dirAttribute = opt_attributes && opt_attributes['dir'];
+  if (dirAttribute) {
+    if (/^(ltr|rtl|auto)$/i.test(dirAttribute)) {
+      // If the tag has the "dir" attribute specified then its direction is
+      // neutral because it can be safely used in any context.
+      dir = goog.i18n.bidi.Dir.NEUTRAL;
+    } else {
+      dir = null;
+    }
+  }
+
+  return goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+      result, dir);
+};
+
+
+/**
+ * Creates a string with attributes to insert after tagName.
+ * @param {string} tagName
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ * @return {string} Returns an empty string if there are no attributes, returns
+ *     a string starting with a space otherwise.
+ * @throws {Error} If attribute value is unsafe for the given tag and attribute.
+ * @package
+ */
+goog.html.SafeHtml.stringifyAttributes = function(tagName, opt_attributes) {
+  var result = '';
+  if (opt_attributes) {
+    for (var name in opt_attributes) {
+      if (!goog.html.SafeHtml.VALID_NAMES_IN_TAG_.test(name)) {
+        throw Error('Invalid attribute name "' + name + '".');
+      }
+      var value = opt_attributes[name];
+      if (!goog.isDefAndNotNull(value)) {
+        continue;
+      }
+      result +=
+          ' ' + goog.html.SafeHtml.getAttrNameAndValue_(tagName, name, value);
+    }
+  }
+  return result;
+};
+
+
+/**
+ * @param {!Object<string, ?goog.html.SafeHtml.AttributeValue>} fixedAttributes
+ * @param {!Object<string, string>} defaultAttributes
+ * @param {?Object<string, ?goog.html.SafeHtml.AttributeValue>=} opt_attributes
+ *     Optional attributes passed to create*().
+ * @return {!Object<string, ?goog.html.SafeHtml.AttributeValue>}
+ * @throws {Error} If opt_attributes contains an attribute with the same name
+ *     as an attribute in fixedAttributes.
+ * @package
+ */
+goog.html.SafeHtml.combineAttributes = function(
+    fixedAttributes, defaultAttributes, opt_attributes) {
+  var combinedAttributes = {};
+  var name;
+
+  for (name in fixedAttributes) {
+    goog.asserts.assert(name.toLowerCase() == name, 'Must be lower case');
+    combinedAttributes[name] = fixedAttributes[name];
+  }
+  for (name in defaultAttributes) {
+    goog.asserts.assert(name.toLowerCase() == name, 'Must be lower case');
+    combinedAttributes[name] = defaultAttributes[name];
+  }
+
+  for (name in opt_attributes) {
+    var nameLower = name.toLowerCase();
+    if (nameLower in fixedAttributes) {
+      throw Error(
+          'Cannot override "' + nameLower + '" attribute, got "' + name +
+          '" with value "' + opt_attributes[name] + '"');
+    }
+    if (nameLower in defaultAttributes) {
+      delete combinedAttributes[nameLower];
+    }
+    combinedAttributes[name] = opt_attributes[name];
+  }
+
+  return combinedAttributes;
+};
+
+
+/**
+ * A SafeHtml instance corresponding to the HTML doctype: "<!DOCTYPE html>".
+ * @const {!goog.html.SafeHtml}
+ */
+goog.html.SafeHtml.DOCTYPE_HTML =
+    goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+        '<!DOCTYPE html>', goog.i18n.bidi.Dir.NEUTRAL);
+
+
+/**
+ * A SafeHtml instance corresponding to the empty string.
+ * @const {!goog.html.SafeHtml}
+ */
+goog.html.SafeHtml.EMPTY =
+    goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+        '', goog.i18n.bidi.Dir.NEUTRAL);
+
+
+/**
+ * A SafeHtml instance corresponding to the <br> tag.
+ * @const {!goog.html.SafeHtml}
+ */
+goog.html.SafeHtml.BR =
+    goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+        '<br>', goog.i18n.bidi.Dir.NEUTRAL);
diff --git a/src/assets/viz/2/goog/html/safescript.js b/src/assets/viz/2/goog/html/safescript.js
new file mode 100644
index 0000000..7a945eb
--- /dev/null
+++ b/src/assets/viz/2/goog/html/safescript.js
@@ -0,0 +1,234 @@
+// Copyright 2014 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview The SafeScript type and its builders.
+ *
+ * TODO(xtof): Link to document stating type contract.
+ */
+
+goog.provide('goog.html.SafeScript');
+
+goog.require('goog.asserts');
+goog.require('goog.string.Const');
+goog.require('goog.string.TypedString');
+
+
+
+/**
+ * A string-like object which represents JavaScript code and that carries the
+ * security type contract that its value, as a string, will not cause execution
+ * of unconstrained attacker controlled code (XSS) when evaluated as JavaScript
+ * in a browser.
+ *
+ * Instances of this type must be created via the factory method
+ * {@code goog.html.SafeScript.fromConstant} and not by invoking its
+ * constructor. The constructor intentionally takes no parameters and the type
+ * is immutable; hence only a default instance corresponding to the empty string
+ * can be obtained via constructor invocation.
+ *
+ * A SafeScript's string representation can safely be interpolated as the
+ * content of a script element within HTML. The SafeScript string should not be
+ * escaped before interpolation.
+ *
+ * Note that the SafeScript might contain text that is attacker-controlled but
+ * that text should have been interpolated with appropriate escaping,
+ * sanitization and/or validation into the right location in the script, such
+ * that it is highly constrained in its effect (for example, it had to match a
+ * set of whitelisted words).
+ *
+ * A SafeScript can be constructed via security-reviewed unchecked
+ * conversions. In this case producers of SafeScript must ensure themselves that
+ * the SafeScript does not contain unsafe script. Note in particular that
+ * {@code &lt;} is dangerous, even when inside JavaScript strings, and so should
+ * always be forbidden or JavaScript escaped in user controlled input. For
+ * example, if {@code &lt;/script&gt;&lt;script&gt;evil&lt;/script&gt;"} were
+ * interpolated inside a JavaScript string, it would break out of the context
+ * of the original script element and {@code evil} would execute. Also note
+ * that within an HTML script (raw text) element, HTML character references,
+ * such as "&lt;" are not allowed. See
+ * http://www.w3.org/TR/html5/scripting-1.html#restrictions-for-contents-of-script-elements.
+ *
+ * @see goog.html.SafeScript#fromConstant
+ * @constructor
+ * @final
+ * @struct
+ * @implements {goog.string.TypedString}
+ */
+goog.html.SafeScript = function() {
+  /**
+   * The contained value of this SafeScript.  The field has a purposely
+   * ugly name to make (non-compiled) code that attempts to directly access this
+   * field stand out.
+   * @private {string}
+   */
+  this.privateDoNotAccessOrElseSafeScriptWrappedValue_ = '';
+
+  /**
+   * A type marker used to implement additional run-time type checking.
+   * @see goog.html.SafeScript#unwrap
+   * @const {!Object}
+   * @private
+   */
+  this.SAFE_SCRIPT_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ =
+      goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.SafeScript.prototype.implementsGoogStringTypedString = true;
+
+
+/**
+ * Type marker for the SafeScript type, used to implement additional
+ * run-time type checking.
+ * @const {!Object}
+ * @private
+ */
+goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ = {};
+
+
+/**
+ * Creates a SafeScript object from a compile-time constant string.
+ *
+ * @param {!goog.string.Const} script A compile-time-constant string from which
+ *     to create a SafeScript.
+ * @return {!goog.html.SafeScript} A SafeScript object initialized to
+ *     {@code script}.
+ */
+goog.html.SafeScript.fromConstant = function(script) {
+  var scriptString = goog.string.Const.unwrap(script);
+  if (scriptString.length === 0) {
+    return goog.html.SafeScript.EMPTY;
+  }
+  return goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse(
+      scriptString);
+};
+
+
+/**
+ * Returns this SafeScript's value as a string.
+ *
+ * IMPORTANT: In code where it is security relevant that an object's type is
+ * indeed {@code SafeScript}, use {@code goog.html.SafeScript.unwrap} instead of
+ * this method. If in doubt, assume that it's security relevant. In particular,
+ * note that goog.html functions which return a goog.html type do not guarantee
+ * the returned instance is of the right type. For example:
+ *
+ * <pre>
+ * var fakeSafeHtml = new String('fake');
+ * fakeSafeHtml.__proto__ = goog.html.SafeHtml.prototype;
+ * var newSafeHtml = goog.html.SafeHtml.htmlEscape(fakeSafeHtml);
+ * // newSafeHtml is just an alias for fakeSafeHtml, it's passed through by
+ * // goog.html.SafeHtml.htmlEscape() as fakeSafeHtml
+ * // instanceof goog.html.SafeHtml.
+ * </pre>
+ *
+ * @see goog.html.SafeScript#unwrap
+ * @override
+ */
+goog.html.SafeScript.prototype.getTypedStringValue = function() {
+  return this.privateDoNotAccessOrElseSafeScriptWrappedValue_;
+};
+
+
+if (goog.DEBUG) {
+  /**
+   * Returns a debug string-representation of this value.
+   *
+   * To obtain the actual string value wrapped in a SafeScript, use
+   * {@code goog.html.SafeScript.unwrap}.
+   *
+   * @see goog.html.SafeScript#unwrap
+   * @override
+   */
+  goog.html.SafeScript.prototype.toString = function() {
+    return 'SafeScript{' +
+        this.privateDoNotAccessOrElseSafeScriptWrappedValue_ + '}';
+  };
+}
+
+
+/**
+ * Performs a runtime check that the provided object is indeed a
+ * SafeScript object, and returns its value.
+ *
+ * @param {!goog.html.SafeScript} safeScript The object to extract from.
+ * @return {string} The safeScript object's contained string, unless
+ *     the run-time type check fails. In that case, {@code unwrap} returns an
+ *     innocuous string, or, if assertions are enabled, throws
+ *     {@code goog.asserts.AssertionError}.
+ */
+goog.html.SafeScript.unwrap = function(safeScript) {
+  // Perform additional Run-time type-checking to ensure that
+  // safeScript is indeed an instance of the expected type.  This
+  // provides some additional protection against security bugs due to
+  // application code that disables type checks.
+  // Specifically, the following checks are performed:
+  // 1. The object is an instance of the expected type.
+  // 2. The object is not an instance of a subclass.
+  // 3. The object carries a type marker for the expected type. "Faking" an
+  // object requires a reference to the type marker, which has names intended
+  // to stand out in code reviews.
+  if (safeScript instanceof goog.html.SafeScript &&
+      safeScript.constructor === goog.html.SafeScript &&
+      safeScript.SAFE_SCRIPT_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ ===
+          goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_) {
+    return safeScript.privateDoNotAccessOrElseSafeScriptWrappedValue_;
+  } else {
+    goog.asserts.fail('expected object of type SafeScript, got \'' +
+        safeScript + '\' of type ' + goog.typeOf(safeScript));
+    return 'type_error:SafeScript';
+  }
+};
+
+
+/**
+ * Package-internal utility method to create SafeScript instances.
+ *
+ * @param {string} script The string to initialize the SafeScript object with.
+ * @return {!goog.html.SafeScript} The initialized SafeScript object.
+ * @package
+ */
+goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse =
+    function(script) {
+  return new goog.html.SafeScript().initSecurityPrivateDoNotAccessOrElse_(
+      script);
+};
+
+
+/**
+ * Called from createSafeScriptSecurityPrivateDoNotAccessOrElse(). This
+ * method exists only so that the compiler can dead code eliminate static
+ * fields (like EMPTY) when they're not accessed.
+ * @param {string} script
+ * @return {!goog.html.SafeScript}
+ * @private
+ */
+goog.html.SafeScript.prototype.initSecurityPrivateDoNotAccessOrElse_ = function(
+    script) {
+  this.privateDoNotAccessOrElseSafeScriptWrappedValue_ = script;
+  return this;
+};
+
+
+/**
+ * A SafeScript instance corresponding to the empty string.
+ * @const {!goog.html.SafeScript}
+ */
+goog.html.SafeScript.EMPTY =
+    goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse('');
diff --git a/src/assets/viz/2/goog/html/safestyle.js b/src/assets/viz/2/goog/html/safestyle.js
new file mode 100644
index 0000000..506a475
--- /dev/null
+++ b/src/assets/viz/2/goog/html/safestyle.js
@@ -0,0 +1,560 @@
+// Copyright 2014 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview The SafeStyle type and its builders.
+ *
+ * TODO(xtof): Link to document stating type contract.
+ */
+
+goog.provide('goog.html.SafeStyle');
+
+goog.require('goog.array');
+goog.require('goog.asserts');
+goog.require('goog.html.SafeUrl');
+goog.require('goog.string');
+goog.require('goog.string.Const');
+goog.require('goog.string.TypedString');
+
+
+
+/**
+ * A string-like object which represents a sequence of CSS declarations
+ * ({@code propertyName1: propertyvalue1; propertyName2: propertyValue2; ...})
+ * and that carries the security type contract that its value, as a string,
+ * will not cause untrusted script execution (XSS) when evaluated as CSS in a
+ * browser.
+ *
+ * Instances of this type must be created via the factory methods
+ * ({@code goog.html.SafeStyle.create} or
+ * {@code goog.html.SafeStyle.fromConstant}) and not by invoking its
+ * constructor. The constructor intentionally takes no parameters and the type
+ * is immutable; hence only a default instance corresponding to the empty string
+ * can be obtained via constructor invocation.
+ *
+ * SafeStyle's string representation can safely be:
+ * <ul>
+ *   <li>Interpolated as the content of a *quoted* HTML style attribute.
+ *       However, the SafeStyle string *must be HTML-attribute-escaped* before
+ *       interpolation.
+ *   <li>Interpolated as the content of a {}-wrapped block within a stylesheet.
+ *       '<' characters in the SafeStyle string *must be CSS-escaped* before
+ *       interpolation. The SafeStyle string is also guaranteed not to be able
+ *       to introduce new properties or elide existing ones.
+ *   <li>Interpolated as the content of a {}-wrapped block within an HTML
+ *       <style> element. '<' characters in the SafeStyle string
+ *       *must be CSS-escaped* before interpolation.
+ *   <li>Assigned to the style property of a DOM node. The SafeStyle string
+ *       should not be escaped before being assigned to the property.
+ * </ul>
+ *
+ * A SafeStyle may never contain literal angle brackets. Otherwise, it could
+ * be unsafe to place a SafeStyle into a &lt;style&gt; tag (where it can't
+ * be HTML escaped). For example, if the SafeStyle containing
+ * "{@code font: 'foo &lt;style/&gt;&lt;script&gt;evil&lt;/script&gt;'}" were
+ * interpolated within a &lt;style&gt; tag, this would then break out of the
+ * style context into HTML.
+ *
+ * A SafeStyle may contain literal single or double quotes, and as such the
+ * entire style string must be escaped when used in a style attribute (if
+ * this were not the case, the string could contain a matching quote that
+ * would escape from the style attribute).
+ *
+ * Values of this type must be composable, i.e. for any two values
+ * {@code style1} and {@code style2} of this type,
+ * {@code goog.html.SafeStyle.unwrap(style1) +
+ * goog.html.SafeStyle.unwrap(style2)} must itself be a value that satisfies
+ * the SafeStyle type constraint. This requirement implies that for any value
+ * {@code style} of this type, {@code goog.html.SafeStyle.unwrap(style)} must
+ * not end in a "property value" or "property name" context. For example,
+ * a value of {@code background:url("} or {@code font-} would not satisfy the
+ * SafeStyle contract. This is because concatenating such strings with a
+ * second value that itself does not contain unsafe CSS can result in an
+ * overall string that does. For example, if {@code javascript:evil())"} is
+ * appended to {@code background:url("}, the resulting string may result in
+ * the execution of a malicious script.
+ *
+ * TODO(mlourenco): Consider whether we should implement UTF-8 interchange
+ * validity checks and blacklisting of newlines (including Unicode ones) and
+ * other whitespace characters (\t, \f). Document here if so and also update
+ * SafeStyle.fromConstant().
+ *
+ * The following example values comply with this type's contract:
+ * <ul>
+ *   <li><pre>width: 1em;</pre>
+ *   <li><pre>height:1em;</pre>
+ *   <li><pre>width: 1em;height: 1em;</pre>
+ *   <li><pre>background:url('http://url');</pre>
+ * </ul>
+ * In addition, the empty string is safe for use in a CSS attribute.
+ *
+ * The following example values do NOT comply with this type's contract:
+ * <ul>
+ *   <li><pre>background: red</pre> (missing a trailing semi-colon)
+ *   <li><pre>background:</pre> (missing a value and a trailing semi-colon)
+ *   <li><pre>1em</pre> (missing an attribute name, which provides context for
+ *       the value)
+ * </ul>
+ *
+ * @see goog.html.SafeStyle#create
+ * @see goog.html.SafeStyle#fromConstant
+ * @see http://www.w3.org/TR/css3-syntax/
+ * @constructor
+ * @final
+ * @struct
+ * @implements {goog.string.TypedString}
+ */
+goog.html.SafeStyle = function() {
+  /**
+   * The contained value of this SafeStyle.  The field has a purposely
+   * ugly name to make (non-compiled) code that attempts to directly access this
+   * field stand out.
+   * @private {string}
+   */
+  this.privateDoNotAccessOrElseSafeStyleWrappedValue_ = '';
+
+  /**
+   * A type marker used to implement additional run-time type checking.
+   * @see goog.html.SafeStyle#unwrap
+   * @const {!Object}
+   * @private
+   */
+  this.SAFE_STYLE_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ =
+      goog.html.SafeStyle.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.SafeStyle.prototype.implementsGoogStringTypedString = true;
+
+
+/**
+ * Type marker for the SafeStyle type, used to implement additional
+ * run-time type checking.
+ * @const {!Object}
+ * @private
+ */
+goog.html.SafeStyle.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ = {};
+
+
+/**
+ * Creates a SafeStyle object from a compile-time constant string.
+ *
+ * {@code style} should be in the format
+ * {@code name: value; [name: value; ...]} and must not have any < or >
+ * characters in it. This is so that SafeStyle's contract is preserved,
+ * allowing the SafeStyle to correctly be interpreted as a sequence of CSS
+ * declarations and without affecting the syntactic structure of any
+ * surrounding CSS and HTML.
+ *
+ * This method performs basic sanity checks on the format of {@code style}
+ * but does not constrain the format of {@code name} and {@code value}, except
+ * for disallowing tag characters.
+ *
+ * @param {!goog.string.Const} style A compile-time-constant string from which
+ *     to create a SafeStyle.
+ * @return {!goog.html.SafeStyle} A SafeStyle object initialized to
+ *     {@code style}.
+ */
+goog.html.SafeStyle.fromConstant = function(style) {
+  var styleString = goog.string.Const.unwrap(style);
+  if (styleString.length === 0) {
+    return goog.html.SafeStyle.EMPTY;
+  }
+  goog.html.SafeStyle.checkStyle_(styleString);
+  goog.asserts.assert(
+      goog.string.endsWith(styleString, ';'),
+      'Last character of style string is not \';\': ' + styleString);
+  goog.asserts.assert(
+      goog.string.contains(styleString, ':'),
+      'Style string must contain at least one \':\', to ' +
+          'specify a "name: value" pair: ' + styleString);
+  return goog.html.SafeStyle.createSafeStyleSecurityPrivateDoNotAccessOrElse(
+      styleString);
+};
+
+
+/**
+ * Checks if the style definition is valid.
+ * @param {string} style
+ * @private
+ */
+goog.html.SafeStyle.checkStyle_ = function(style) {
+  goog.asserts.assert(
+      !/[<>]/.test(style), 'Forbidden characters in style string: ' + style);
+};
+
+
+/**
+ * Returns this SafeStyle's value as a string.
+ *
+ * IMPORTANT: In code where it is security relevant that an object's type is
+ * indeed {@code SafeStyle}, use {@code goog.html.SafeStyle.unwrap} instead of
+ * this method. If in doubt, assume that it's security relevant. In particular,
+ * note that goog.html functions which return a goog.html type do not guarantee
+ * the returned instance is of the right type. For example:
+ *
+ * <pre>
+ * var fakeSafeHtml = new String('fake');
+ * fakeSafeHtml.__proto__ = goog.html.SafeHtml.prototype;
+ * var newSafeHtml = goog.html.SafeHtml.htmlEscape(fakeSafeHtml);
+ * // newSafeHtml is just an alias for fakeSafeHtml, it's passed through by
+ * // goog.html.SafeHtml.htmlEscape() as fakeSafeHtml
+ * // instanceof goog.html.SafeHtml.
+ * </pre>
+ *
+ * @see goog.html.SafeStyle#unwrap
+ * @override
+ */
+goog.html.SafeStyle.prototype.getTypedStringValue = function() {
+  return this.privateDoNotAccessOrElseSafeStyleWrappedValue_;
+};
+
+
+if (goog.DEBUG) {
+  /**
+   * Returns a debug string-representation of this value.
+   *
+   * To obtain the actual string value wrapped in a SafeStyle, use
+   * {@code goog.html.SafeStyle.unwrap}.
+   *
+   * @see goog.html.SafeStyle#unwrap
+   * @override
+   */
+  goog.html.SafeStyle.prototype.toString = function() {
+    return 'SafeStyle{' + this.privateDoNotAccessOrElseSafeStyleWrappedValue_ +
+        '}';
+  };
+}
+
+
+/**
+ * Performs a runtime check that the provided object is indeed a
+ * SafeStyle object, and returns its value.
+ *
+ * @param {!goog.html.SafeStyle} safeStyle The object to extract from.
+ * @return {string} The safeStyle object's contained string, unless
+ *     the run-time type check fails. In that case, {@code unwrap} returns an
+ *     innocuous string, or, if assertions are enabled, throws
+ *     {@code goog.asserts.AssertionError}.
+ */
+goog.html.SafeStyle.unwrap = function(safeStyle) {
+  // Perform additional Run-time type-checking to ensure that
+  // safeStyle is indeed an instance of the expected type.  This
+  // provides some additional protection against security bugs due to
+  // application code that disables type checks.
+  // Specifically, the following checks are performed:
+  // 1. The object is an instance of the expected type.
+  // 2. The object is not an instance of a subclass.
+  // 3. The object carries a type marker for the expected type. "Faking" an
+  // object requires a reference to the type marker, which has names intended
+  // to stand out in code reviews.
+  if (safeStyle instanceof goog.html.SafeStyle &&
+      safeStyle.constructor === goog.html.SafeStyle &&
+      safeStyle.SAFE_STYLE_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ ===
+          goog.html.SafeStyle.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_) {
+    return safeStyle.privateDoNotAccessOrElseSafeStyleWrappedValue_;
+  } else {
+    goog.asserts.fail('expected object of type SafeStyle, got \'' +
+        safeStyle + '\' of type ' + goog.typeOf(safeStyle));
+    return 'type_error:SafeStyle';
+  }
+};
+
+
+/**
+ * Package-internal utility method to create SafeStyle instances.
+ *
+ * @param {string} style The string to initialize the SafeStyle object with.
+ * @return {!goog.html.SafeStyle} The initialized SafeStyle object.
+ * @package
+ */
+goog.html.SafeStyle.createSafeStyleSecurityPrivateDoNotAccessOrElse = function(
+    style) {
+  return new goog.html.SafeStyle().initSecurityPrivateDoNotAccessOrElse_(style);
+};
+
+
+/**
+ * Called from createSafeStyleSecurityPrivateDoNotAccessOrElse(). This
+ * method exists only so that the compiler can dead code eliminate static
+ * fields (like EMPTY) when they're not accessed.
+ * @param {string} style
+ * @return {!goog.html.SafeStyle}
+ * @private
+ */
+goog.html.SafeStyle.prototype.initSecurityPrivateDoNotAccessOrElse_ = function(
+    style) {
+  this.privateDoNotAccessOrElseSafeStyleWrappedValue_ = style;
+  return this;
+};
+
+
+/**
+ * A SafeStyle instance corresponding to the empty string.
+ * @const {!goog.html.SafeStyle}
+ */
+goog.html.SafeStyle.EMPTY =
+    goog.html.SafeStyle.createSafeStyleSecurityPrivateDoNotAccessOrElse('');
+
+
+/**
+ * The innocuous string generated by goog.html.SafeStyle.create when passed
+ * an unsafe value.
+ * @const {string}
+ */
+goog.html.SafeStyle.INNOCUOUS_STRING = 'zClosurez';
+
+
+/**
+ * A single property value.
+ * @typedef {string|!goog.string.Const|!goog.html.SafeUrl}
+ */
+goog.html.SafeStyle.PropertyValue;
+
+
+/**
+ * Mapping of property names to their values.
+ * We don't support numbers even though some values might be numbers (e.g.
+ * line-height or 0 for any length). The reason is that most numeric values need
+ * units (e.g. '1px') and allowing numbers could cause users forgetting about
+ * them.
+ * @typedef {!Object<string, ?goog.html.SafeStyle.PropertyValue|
+ *     ?Array<!goog.html.SafeStyle.PropertyValue>>}
+ */
+goog.html.SafeStyle.PropertyMap;
+
+
+/**
+ * Creates a new SafeStyle object from the properties specified in the map.
+ * @param {goog.html.SafeStyle.PropertyMap} map Mapping of property names to
+ *     their values, for example {'margin': '1px'}. Names must consist of
+ *     [-_a-zA-Z0-9]. Values might be strings consisting of
+ *     [-,.'"%_!# a-zA-Z0-9], where " and ' must be properly balanced. We also
+ *     allow simple functions like rgb() and url() which sanitizes its contents.
+ *     Other values must be wrapped in goog.string.Const. URLs might be passed
+ *     as goog.html.SafeUrl which will be wrapped into url(""). We also support
+ *     array whose elements are joined with ' '. Null value causes skipping the
+ *     property.
+ * @return {!goog.html.SafeStyle}
+ * @throws {Error} If invalid name is provided.
+ * @throws {goog.asserts.AssertionError} If invalid value is provided. With
+ *     disabled assertions, invalid value is replaced by
+ *     goog.html.SafeStyle.INNOCUOUS_STRING.
+ */
+goog.html.SafeStyle.create = function(map) {
+  var style = '';
+  for (var name in map) {
+    if (!/^[-_a-zA-Z0-9]+$/.test(name)) {
+      throw Error('Name allows only [-_a-zA-Z0-9], got: ' + name);
+    }
+    var value = map[name];
+    if (value == null) {
+      continue;
+    }
+    if (goog.isArray(value)) {
+      value = goog.array.map(value, goog.html.SafeStyle.sanitizePropertyValue_)
+                  .join(' ');
+    } else {
+      value = goog.html.SafeStyle.sanitizePropertyValue_(value);
+    }
+    style += name + ':' + value + ';';
+  }
+  if (!style) {
+    return goog.html.SafeStyle.EMPTY;
+  }
+  goog.html.SafeStyle.checkStyle_(style);
+  return goog.html.SafeStyle.createSafeStyleSecurityPrivateDoNotAccessOrElse(
+      style);
+};
+
+
+/**
+ * Checks and converts value to string.
+ * @param {!goog.html.SafeStyle.PropertyValue} value
+ * @return {string}
+ * @private
+ */
+goog.html.SafeStyle.sanitizePropertyValue_ = function(value) {
+  if (value instanceof goog.html.SafeUrl) {
+    var url = goog.html.SafeUrl.unwrap(value);
+    return 'url("' + url.replace(/</g, '%3c').replace(/[\\"]/g, '\\$&') + '")';
+  }
+  var result = value instanceof goog.string.Const ?
+      goog.string.Const.unwrap(value) :
+      goog.html.SafeStyle.sanitizePropertyValueString_(String(value));
+  // These characters can be used to change context and we don't want that even
+  // with const values.
+  goog.asserts.assert(!/[{;}]/.test(result), 'Value does not allow [{;}].');
+  return result;
+};
+
+
+/**
+ * Checks string value.
+ * @param {string} value
+ * @return {string}
+ * @private
+ */
+goog.html.SafeStyle.sanitizePropertyValueString_ = function(value) {
+  var valueWithoutFunctions =
+      value.replace(goog.html.SafeUrl.FUNCTIONS_RE_, '$1')
+          .replace(goog.html.SafeUrl.URL_RE_, 'url');
+  if (!goog.html.SafeStyle.VALUE_RE_.test(valueWithoutFunctions)) {
+    goog.asserts.fail(
+        'String value allows only ' + goog.html.SafeStyle.VALUE_ALLOWED_CHARS_ +
+        ' and simple functions, got: ' + value);
+    return goog.html.SafeStyle.INNOCUOUS_STRING;
+  } else if (!goog.html.SafeStyle.hasBalancedQuotes_(value)) {
+    goog.asserts.fail('String value requires balanced quotes, got: ' + value);
+    return goog.html.SafeStyle.INNOCUOUS_STRING;
+  }
+  return goog.html.SafeStyle.sanitizeUrl_(value);
+};
+
+
+/**
+ * Checks that quotes (" and ') are properly balanced inside a string. Assumes
+ * that neither escape (\) nor any other character that could result in
+ * breaking out of a string parsing context are allowed;
+ * see http://www.w3.org/TR/css3-syntax/#string-token-diagram.
+ * @param {string} value Untrusted CSS property value.
+ * @return {boolean} True if property value is safe with respect to quote
+ *     balancedness.
+ * @private
+ */
+goog.html.SafeStyle.hasBalancedQuotes_ = function(value) {
+  var outsideSingle = true;
+  var outsideDouble = true;
+  for (var i = 0; i < value.length; i++) {
+    var c = value.charAt(i);
+    if (c == "'" && outsideDouble) {
+      outsideSingle = !outsideSingle;
+    } else if (c == '"' && outsideSingle) {
+      outsideDouble = !outsideDouble;
+    }
+  }
+  return outsideSingle && outsideDouble;
+};
+
+
+/**
+ * Characters allowed in goog.html.SafeStyle.VALUE_RE_.
+ * @private {string}
+ */
+goog.html.SafeStyle.VALUE_ALLOWED_CHARS_ = '[-,."\'%_!# a-zA-Z0-9]';
+
+
+/**
+ * Regular expression for safe values.
+ *
+ * Quotes (" and ') are allowed, but a check must be done elsewhere to ensure
+ * they're balanced.
+ *
+ * ',' allows multiple values to be assigned to the same property
+ * (e.g. background-attachment or font-family) and hence could allow
+ * multiple values to get injected, but that should pose no risk of XSS.
+ *
+ * The expression checks only for XSS safety, not for CSS validity.
+ * @const {!RegExp}
+ * @private
+ */
+goog.html.SafeStyle.VALUE_RE_ =
+    new RegExp('^' + goog.html.SafeStyle.VALUE_ALLOWED_CHARS_ + '+$');
+
+
+/**
+ * Regular expression for url(). We support URLs allowed by
+ * https://www.w3.org/TR/css-syntax-3/#url-token-diagram without using escape
+ * sequences. Use percent-encoding if you need to use special characters like
+ * backslash.
+ * @private @const {!RegExp}
+ */
+goog.html.SafeUrl.URL_RE_ = new RegExp(
+    '\\b(url\\([ \t\n]*)(' +
+        '\'[ -&(-\\[\\]-~]*\'' +  // Printable characters except ' and \.
+        '|"[ !#-\\[\\]-~]*"' +    // Printable characters except " and \.
+        '|[!#-&*-\\[\\]-~]*' +    // Printable characters except [ "'()\\].
+        ')([ \t\n]*\\))',
+    'g');
+
+
+/**
+ * Regular expression for simple functions.
+ * @private @const {!RegExp}
+ */
+goog.html.SafeUrl.FUNCTIONS_RE_ = new RegExp(
+    '\\b(hsl|hsla|rgb|rgba|(rotate|scale|translate)(X|Y|Z|3d)?)' +
+        '\\([-0-9a-z.%, ]+\\)',
+    'g');
+
+
+/**
+ * Sanitize URLs inside url().
+ *
+ * NOTE: We could also consider using CSS.escape once that's available in the
+ * browsers. However, loosely matching URL e.g. with url\(.*\) and then escaping
+ * the contents would result in a slightly different language than CSS leading
+ * to confusion of users. E.g. url(")") is valid in CSS but it would be invalid
+ * as seen by our parser. On the other hand, url(\) is invalid in CSS but our
+ * parser would be fine with it.
+ *
+ * @param {string} value Untrusted CSS property value.
+ * @return {string}
+ * @private
+ */
+goog.html.SafeStyle.sanitizeUrl_ = function(value) {
+  return value.replace(
+      goog.html.SafeUrl.URL_RE_, function(match, before, url, after) {
+        var quote = '';
+        url = url.replace(/^(['"])(.*)\1$/, function(match, start, inside) {
+          quote = start;
+          return inside;
+        });
+        var sanitized = goog.html.SafeUrl.sanitize(url).getTypedStringValue();
+        return before + quote + sanitized + quote + after;
+      });
+};
+
+
+/**
+ * Creates a new SafeStyle object by concatenating the values.
+ * @param {...(!goog.html.SafeStyle|!Array<!goog.html.SafeStyle>)} var_args
+ *     SafeStyles to concatenate.
+ * @return {!goog.html.SafeStyle}
+ */
+goog.html.SafeStyle.concat = function(var_args) {
+  var style = '';
+
+  /**
+   * @param {!goog.html.SafeStyle|!Array<!goog.html.SafeStyle>} argument
+   */
+  var addArgument = function(argument) {
+    if (goog.isArray(argument)) {
+      goog.array.forEach(argument, addArgument);
+    } else {
+      style += goog.html.SafeStyle.unwrap(argument);
+    }
+  };
+
+  goog.array.forEach(arguments, addArgument);
+  if (!style) {
+    return goog.html.SafeStyle.EMPTY;
+  }
+  return goog.html.SafeStyle.createSafeStyleSecurityPrivateDoNotAccessOrElse(
+      style);
+};
diff --git a/src/assets/viz/2/goog/html/safestylesheet.js b/src/assets/viz/2/goog/html/safestylesheet.js
new file mode 100644
index 0000000..cdd9e31
--- /dev/null
+++ b/src/assets/viz/2/goog/html/safestylesheet.js
@@ -0,0 +1,344 @@
+// Copyright 2014 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview The SafeStyleSheet type and its builders.
+ *
+ * TODO(xtof): Link to document stating type contract.
+ */
+
+goog.provide('goog.html.SafeStyleSheet');
+
+goog.require('goog.array');
+goog.require('goog.asserts');
+goog.require('goog.html.SafeStyle');
+goog.require('goog.object');
+goog.require('goog.string');
+goog.require('goog.string.Const');
+goog.require('goog.string.TypedString');
+
+
+
+/**
+ * A string-like object which represents a CSS style sheet and that carries the
+ * security type contract that its value, as a string, will not cause untrusted
+ * script execution (XSS) when evaluated as CSS in a browser.
+ *
+ * Instances of this type must be created via the factory method
+ * {@code goog.html.SafeStyleSheet.fromConstant} and not by invoking its
+ * constructor. The constructor intentionally takes no parameters and the type
+ * is immutable; hence only a default instance corresponding to the empty string
+ * can be obtained via constructor invocation.
+ *
+ * A SafeStyleSheet's string representation can safely be interpolated as the
+ * content of a style element within HTML. The SafeStyleSheet string should
+ * not be escaped before interpolation.
+ *
+ * Values of this type must be composable, i.e. for any two values
+ * {@code styleSheet1} and {@code styleSheet2} of this type,
+ * {@code goog.html.SafeStyleSheet.unwrap(styleSheet1) +
+ * goog.html.SafeStyleSheet.unwrap(styleSheet2)} must itself be a value that
+ * satisfies the SafeStyleSheet type constraint. This requirement implies that
+ * for any value {@code styleSheet} of this type,
+ * {@code goog.html.SafeStyleSheet.unwrap(styleSheet1)} must end in
+ * "beginning of rule" context.
+
+ * A SafeStyleSheet can be constructed via security-reviewed unchecked
+ * conversions. In this case producers of SafeStyleSheet must ensure themselves
+ * that the SafeStyleSheet does not contain unsafe script. Note in particular
+ * that {@code &lt;} is dangerous, even when inside CSS strings, and so should
+ * always be forbidden or CSS-escaped in user controlled input. For example, if
+ * {@code &lt;/style&gt;&lt;script&gt;evil&lt;/script&gt;"} were interpolated
+ * inside a CSS string, it would break out of the context of the original
+ * style element and {@code evil} would execute. Also note that within an HTML
+ * style (raw text) element, HTML character references, such as
+ * {@code &amp;lt;}, are not allowed. See
+ *
+ http://www.w3.org/TR/html5/scripting-1.html#restrictions-for-contents-of-script-elements
+ * (similar considerations apply to the style element).
+ *
+ * @see goog.html.SafeStyleSheet#fromConstant
+ * @constructor
+ * @final
+ * @struct
+ * @implements {goog.string.TypedString}
+ */
+goog.html.SafeStyleSheet = function() {
+  /**
+   * The contained value of this SafeStyleSheet.  The field has a purposely
+   * ugly name to make (non-compiled) code that attempts to directly access this
+   * field stand out.
+   * @private {string}
+   */
+  this.privateDoNotAccessOrElseSafeStyleSheetWrappedValue_ = '';
+
+  /**
+   * A type marker used to implement additional run-time type checking.
+   * @see goog.html.SafeStyleSheet#unwrap
+   * @const {!Object}
+   * @private
+   */
+  this.SAFE_STYLE_SHEET_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ =
+      goog.html.SafeStyleSheet.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.SafeStyleSheet.prototype.implementsGoogStringTypedString = true;
+
+
+/**
+ * Type marker for the SafeStyleSheet type, used to implement additional
+ * run-time type checking.
+ * @const {!Object}
+ * @private
+ */
+goog.html.SafeStyleSheet.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ = {};
+
+
+/**
+ * Creates a style sheet consisting of one selector and one style definition.
+ * Use {@link goog.html.SafeStyleSheet.concat} to create longer style sheets.
+ * This function doesn't support @import, @media and similar constructs.
+ * @param {string} selector CSS selector, e.g. '#id' or 'tag .class, #id'. We
+ *     support CSS3 selectors: https://w3.org/TR/css3-selectors/#selectors.
+ * @param {!goog.html.SafeStyle.PropertyMap|!goog.html.SafeStyle} style Style
+ *     definition associated with the selector.
+ * @return {!goog.html.SafeStyleSheet}
+ * @throws {Error} If invalid selector is provided.
+ */
+goog.html.SafeStyleSheet.createRule = function(selector, style) {
+  if (goog.string.contains(selector, '<')) {
+    throw Error('Selector does not allow \'<\', got: ' + selector);
+  }
+
+  // Remove strings.
+  var selectorToCheck =
+      selector.replace(/('|")((?!\1)[^\r\n\f\\]|\\[\s\S])*\1/g, '');
+
+  // Check characters allowed in CSS3 selectors.
+  if (!/^[-_a-zA-Z0-9#.:* ,>+~[\]()=^$|]+$/.test(selectorToCheck)) {
+    throw Error(
+        'Selector allows only [-_a-zA-Z0-9#.:* ,>+~[\\]()=^$|] and ' +
+        'strings, got: ' + selector);
+  }
+
+  // Check balanced () and [].
+  if (!goog.html.SafeStyleSheet.hasBalancedBrackets_(selectorToCheck)) {
+    throw Error('() and [] in selector must be balanced, got: ' + selector);
+  }
+
+  if (!(style instanceof goog.html.SafeStyle)) {
+    style = goog.html.SafeStyle.create(style);
+  }
+  var styleSheet = selector + '{' + goog.html.SafeStyle.unwrap(style) + '}';
+  return goog.html.SafeStyleSheet
+      .createSafeStyleSheetSecurityPrivateDoNotAccessOrElse(styleSheet);
+};
+
+
+/**
+ * Checks if a string has balanced () and [] brackets.
+ * @param {string} s String to check.
+ * @return {boolean}
+ * @private
+ */
+goog.html.SafeStyleSheet.hasBalancedBrackets_ = function(s) {
+  var brackets = {'(': ')', '[': ']'};
+  var expectedBrackets = [];
+  for (var i = 0; i < s.length; i++) {
+    var ch = s[i];
+    if (brackets[ch]) {
+      expectedBrackets.push(brackets[ch]);
+    } else if (goog.object.contains(brackets, ch)) {
+      if (expectedBrackets.pop() != ch) {
+        return false;
+      }
+    }
+  }
+  return expectedBrackets.length == 0;
+};
+
+
+/**
+ * Creates a new SafeStyleSheet object by concatenating values.
+ * @param {...(!goog.html.SafeStyleSheet|!Array<!goog.html.SafeStyleSheet>)}
+ *     var_args Values to concatenate.
+ * @return {!goog.html.SafeStyleSheet}
+ */
+goog.html.SafeStyleSheet.concat = function(var_args) {
+  var result = '';
+
+  /**
+   * @param {!goog.html.SafeStyleSheet|!Array<!goog.html.SafeStyleSheet>}
+   *     argument
+   */
+  var addArgument = function(argument) {
+    if (goog.isArray(argument)) {
+      goog.array.forEach(argument, addArgument);
+    } else {
+      result += goog.html.SafeStyleSheet.unwrap(argument);
+    }
+  };
+
+  goog.array.forEach(arguments, addArgument);
+  return goog.html.SafeStyleSheet
+      .createSafeStyleSheetSecurityPrivateDoNotAccessOrElse(result);
+};
+
+
+/**
+ * Creates a SafeStyleSheet object from a compile-time constant string.
+ *
+ * {@code styleSheet} must not have any &lt; characters in it, so that
+ * the syntactic structure of the surrounding HTML is not affected.
+ *
+ * @param {!goog.string.Const} styleSheet A compile-time-constant string from
+ *     which to create a SafeStyleSheet.
+ * @return {!goog.html.SafeStyleSheet} A SafeStyleSheet object initialized to
+ *     {@code styleSheet}.
+ */
+goog.html.SafeStyleSheet.fromConstant = function(styleSheet) {
+  var styleSheetString = goog.string.Const.unwrap(styleSheet);
+  if (styleSheetString.length === 0) {
+    return goog.html.SafeStyleSheet.EMPTY;
+  }
+  // > is a valid character in CSS selectors and there's no strict need to
+  // block it if we already block <.
+  goog.asserts.assert(
+      !goog.string.contains(styleSheetString, '<'),
+      "Forbidden '<' character in style sheet string: " + styleSheetString);
+  return goog.html.SafeStyleSheet
+      .createSafeStyleSheetSecurityPrivateDoNotAccessOrElse(styleSheetString);
+};
+
+
+/**
+ * Returns this SafeStyleSheet's value as a string.
+ *
+ * IMPORTANT: In code where it is security relevant that an object's type is
+ * indeed {@code SafeStyleSheet}, use {@code goog.html.SafeStyleSheet.unwrap}
+ * instead of this method. If in doubt, assume that it's security relevant. In
+ * particular, note that goog.html functions which return a goog.html type do
+ * not guarantee the returned instance is of the right type. For example:
+ *
+ * <pre>
+ * var fakeSafeHtml = new String('fake');
+ * fakeSafeHtml.__proto__ = goog.html.SafeHtml.prototype;
+ * var newSafeHtml = goog.html.SafeHtml.htmlEscape(fakeSafeHtml);
+ * // newSafeHtml is just an alias for fakeSafeHtml, it's passed through by
+ * // goog.html.SafeHtml.htmlEscape() as fakeSafeHtml
+ * // instanceof goog.html.SafeHtml.
+ * </pre>
+ *
+ * @see goog.html.SafeStyleSheet#unwrap
+ * @override
+ */
+goog.html.SafeStyleSheet.prototype.getTypedStringValue = function() {
+  return this.privateDoNotAccessOrElseSafeStyleSheetWrappedValue_;
+};
+
+
+if (goog.DEBUG) {
+  /**
+   * Returns a debug string-representation of this value.
+   *
+   * To obtain the actual string value wrapped in a SafeStyleSheet, use
+   * {@code goog.html.SafeStyleSheet.unwrap}.
+   *
+   * @see goog.html.SafeStyleSheet#unwrap
+   * @override
+   */
+  goog.html.SafeStyleSheet.prototype.toString = function() {
+    return 'SafeStyleSheet{' +
+        this.privateDoNotAccessOrElseSafeStyleSheetWrappedValue_ + '}';
+  };
+}
+
+
+/**
+ * Performs a runtime check that the provided object is indeed a
+ * SafeStyleSheet object, and returns its value.
+ *
+ * @param {!goog.html.SafeStyleSheet} safeStyleSheet The object to extract from.
+ * @return {string} The safeStyleSheet object's contained string, unless
+ *     the run-time type check fails. In that case, {@code unwrap} returns an
+ *     innocuous string, or, if assertions are enabled, throws
+ *     {@code goog.asserts.AssertionError}.
+ */
+goog.html.SafeStyleSheet.unwrap = function(safeStyleSheet) {
+  // Perform additional Run-time type-checking to ensure that
+  // safeStyleSheet is indeed an instance of the expected type.  This
+  // provides some additional protection against security bugs due to
+  // application code that disables type checks.
+  // Specifically, the following checks are performed:
+  // 1. The object is an instance of the expected type.
+  // 2. The object is not an instance of a subclass.
+  // 3. The object carries a type marker for the expected type. "Faking" an
+  // object requires a reference to the type marker, which has names intended
+  // to stand out in code reviews.
+  if (safeStyleSheet instanceof goog.html.SafeStyleSheet &&
+      safeStyleSheet.constructor === goog.html.SafeStyleSheet &&
+      safeStyleSheet
+              .SAFE_STYLE_SHEET_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ ===
+          goog.html.SafeStyleSheet.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_) {
+    return safeStyleSheet.privateDoNotAccessOrElseSafeStyleSheetWrappedValue_;
+  } else {
+    goog.asserts.fail('expected object of type SafeStyleSheet, got \'' +
+        safeStyleSheet + '\' of type ' + goog.typeOf(safeStyleSheet));
+    return 'type_error:SafeStyleSheet';
+  }
+};
+
+
+/**
+ * Package-internal utility method to create SafeStyleSheet instances.
+ *
+ * @param {string} styleSheet The string to initialize the SafeStyleSheet
+ *     object with.
+ * @return {!goog.html.SafeStyleSheet} The initialized SafeStyleSheet object.
+ * @package
+ */
+goog.html.SafeStyleSheet.createSafeStyleSheetSecurityPrivateDoNotAccessOrElse =
+    function(styleSheet) {
+  return new goog.html.SafeStyleSheet().initSecurityPrivateDoNotAccessOrElse_(
+      styleSheet);
+};
+
+
+/**
+ * Called from createSafeStyleSheetSecurityPrivateDoNotAccessOrElse(). This
+ * method exists only so that the compiler can dead code eliminate static
+ * fields (like EMPTY) when they're not accessed.
+ * @param {string} styleSheet
+ * @return {!goog.html.SafeStyleSheet}
+ * @private
+ */
+goog.html.SafeStyleSheet.prototype.initSecurityPrivateDoNotAccessOrElse_ =
+    function(styleSheet) {
+  this.privateDoNotAccessOrElseSafeStyleSheetWrappedValue_ = styleSheet;
+  return this;
+};
+
+
+/**
+ * A SafeStyleSheet instance corresponding to the empty string.
+ * @const {!goog.html.SafeStyleSheet}
+ */
+goog.html.SafeStyleSheet.EMPTY =
+    goog.html.SafeStyleSheet
+        .createSafeStyleSheetSecurityPrivateDoNotAccessOrElse('');
diff --git a/src/assets/viz/2/goog/html/safeurl.js b/src/assets/viz/2/goog/html/safeurl.js
new file mode 100644
index 0000000..3d1ee11
--- /dev/null
+++ b/src/assets/viz/2/goog/html/safeurl.js
@@ -0,0 +1,454 @@
+// Copyright 2013 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview The SafeUrl type and its builders.
+ *
+ * TODO(xtof): Link to document stating type contract.
+ */
+
+goog.provide('goog.html.SafeUrl');
+
+goog.require('goog.asserts');
+goog.require('goog.fs.url');
+goog.require('goog.html.TrustedResourceUrl');
+goog.require('goog.i18n.bidi.Dir');
+goog.require('goog.i18n.bidi.DirectionalString');
+goog.require('goog.string');
+goog.require('goog.string.Const');
+goog.require('goog.string.TypedString');
+
+
+
+/**
+ * A string that is safe to use in URL context in DOM APIs and HTML documents.
+ *
+ * A SafeUrl is a string-like object that carries the security type contract
+ * that its value as a string will not cause untrusted script execution
+ * when evaluated as a hyperlink URL in a browser.
+ *
+ * Values of this type are guaranteed to be safe to use in URL/hyperlink
+ * contexts, such as assignment to URL-valued DOM properties, in the sense that
+ * the use will not result in a Cross-Site-Scripting vulnerability. Similarly,
+ * SafeUrls can be interpolated into the URL context of an HTML template (e.g.,
+ * inside a href attribute). However, appropriate HTML-escaping must still be
+ * applied.
+ *
+ * Note that, as documented in {@code goog.html.SafeUrl.unwrap}, this type's
+ * contract does not guarantee that instances are safe to interpolate into HTML
+ * without appropriate escaping.
+ *
+ * Note also that this type's contract does not imply any guarantees regarding
+ * the resource the URL refers to.  In particular, SafeUrls are <b>not</b>
+ * safe to use in a context where the referred-to resource is interpreted as
+ * trusted code, e.g., as the src of a script tag.
+ *
+ * Instances of this type must be created via the factory methods
+ * ({@code goog.html.SafeUrl.fromConstant}, {@code goog.html.SafeUrl.sanitize}),
+ * etc and not by invoking its constructor.  The constructor intentionally
+ * takes no parameters and the type is immutable; hence only a default instance
+ * corresponding to the empty string can be obtained via constructor invocation.
+ *
+ * @see goog.html.SafeUrl#fromConstant
+ * @see goog.html.SafeUrl#from
+ * @see goog.html.SafeUrl#sanitize
+ * @constructor
+ * @final
+ * @struct
+ * @implements {goog.i18n.bidi.DirectionalString}
+ * @implements {goog.string.TypedString}
+ */
+goog.html.SafeUrl = function() {
+  /**
+   * The contained value of this SafeUrl.  The field has a purposely ugly
+   * name to make (non-compiled) code that attempts to directly access this
+   * field stand out.
+   * @private {string}
+   */
+  this.privateDoNotAccessOrElseSafeHtmlWrappedValue_ = '';
+
+  /**
+   * A type marker used to implement additional run-time type checking.
+   * @see goog.html.SafeUrl#unwrap
+   * @const {!Object}
+   * @private
+   */
+  this.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ =
+      goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_;
+};
+
+
+/**
+ * The innocuous string generated by goog.html.SafeUrl.sanitize when passed
+ * an unsafe URL.
+ *
+ * about:invalid is registered in
+ * http://www.w3.org/TR/css3-values/#about-invalid.
+ * http://tools.ietf.org/html/rfc6694#section-2.2.1 permits about URLs to
+ * contain a fragment, which is not to be considered when determining if an
+ * about URL is well-known.
+ *
+ * Using about:invalid seems preferable to using a fixed data URL, since
+ * browsers might choose to not report CSP violations on it, as legitimate
+ * CSS function calls to attr() can result in this URL being produced. It is
+ * also a standard URL which matches exactly the semantics we need:
+ * "The about:invalid URI references a non-existent document with a generic
+ * error condition. It can be used when a URI is necessary, but the default
+ * value shouldn't be resolveable as any type of document".
+ *
+ * @const {string}
+ */
+goog.html.SafeUrl.INNOCUOUS_STRING = 'about:invalid#zClosurez';
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.SafeUrl.prototype.implementsGoogStringTypedString = true;
+
+
+/**
+ * Returns this SafeUrl's value a string.
+ *
+ * IMPORTANT: In code where it is security relevant that an object's type is
+ * indeed {@code SafeUrl}, use {@code goog.html.SafeUrl.unwrap} instead of this
+ * method. If in doubt, assume that it's security relevant. In particular, note
+ * that goog.html functions which return a goog.html type do not guarantee that
+ * the returned instance is of the right type. For example:
+ *
+ * <pre>
+ * var fakeSafeHtml = new String('fake');
+ * fakeSafeHtml.__proto__ = goog.html.SafeHtml.prototype;
+ * var newSafeHtml = goog.html.SafeHtml.htmlEscape(fakeSafeHtml);
+ * // newSafeHtml is just an alias for fakeSafeHtml, it's passed through by
+ * // goog.html.SafeHtml.htmlEscape() as fakeSafeHtml instanceof
+ * // goog.html.SafeHtml.
+ * </pre>
+ *
+ * IMPORTANT: The guarantees of the SafeUrl type contract only extend to the
+ * behavior of browsers when interpreting URLs. Values of SafeUrl objects MUST
+ * be appropriately escaped before embedding in a HTML document. Note that the
+ * required escaping is context-sensitive (e.g. a different escaping is
+ * required for embedding a URL in a style property within a style
+ * attribute, as opposed to embedding in a href attribute).
+ *
+ * @see goog.html.SafeUrl#unwrap
+ * @override
+ */
+goog.html.SafeUrl.prototype.getTypedStringValue = function() {
+  return this.privateDoNotAccessOrElseSafeHtmlWrappedValue_;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.SafeUrl.prototype.implementsGoogI18nBidiDirectionalString = true;
+
+
+/**
+ * Returns this URLs directionality, which is always {@code LTR}.
+ * @override
+ */
+goog.html.SafeUrl.prototype.getDirection = function() {
+  return goog.i18n.bidi.Dir.LTR;
+};
+
+
+if (goog.DEBUG) {
+  /**
+   * Returns a debug string-representation of this value.
+   *
+   * To obtain the actual string value wrapped in a SafeUrl, use
+   * {@code goog.html.SafeUrl.unwrap}.
+   *
+   * @see goog.html.SafeUrl#unwrap
+   * @override
+   */
+  goog.html.SafeUrl.prototype.toString = function() {
+    return 'SafeUrl{' + this.privateDoNotAccessOrElseSafeHtmlWrappedValue_ +
+        '}';
+  };
+}
+
+
+/**
+ * Performs a runtime check that the provided object is indeed a SafeUrl
+ * object, and returns its value.
+ *
+ * IMPORTANT: The guarantees of the SafeUrl type contract only extend to the
+ * behavior of  browsers when interpreting URLs. Values of SafeUrl objects MUST
+ * be appropriately escaped before embedding in a HTML document. Note that the
+ * required escaping is context-sensitive (e.g. a different escaping is
+ * required for embedding a URL in a style property within a style
+ * attribute, as opposed to embedding in a href attribute).
+ *
+ * @param {!goog.html.SafeUrl} safeUrl The object to extract from.
+ * @return {string} The SafeUrl object's contained string, unless the run-time
+ *     type check fails. In that case, {@code unwrap} returns an innocuous
+ *     string, or, if assertions are enabled, throws
+ *     {@code goog.asserts.AssertionError}.
+ */
+goog.html.SafeUrl.unwrap = function(safeUrl) {
+  // Perform additional Run-time type-checking to ensure that safeUrl is indeed
+  // an instance of the expected type.  This provides some additional protection
+  // against security bugs due to application code that disables type checks.
+  // Specifically, the following checks are performed:
+  // 1. The object is an instance of the expected type.
+  // 2. The object is not an instance of a subclass.
+  // 3. The object carries a type marker for the expected type. "Faking" an
+  // object requires a reference to the type marker, which has names intended
+  // to stand out in code reviews.
+  if (safeUrl instanceof goog.html.SafeUrl &&
+      safeUrl.constructor === goog.html.SafeUrl &&
+      safeUrl.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ ===
+          goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_) {
+    return safeUrl.privateDoNotAccessOrElseSafeHtmlWrappedValue_;
+  } else {
+    goog.asserts.fail('expected object of type SafeUrl, got \'' +
+        safeUrl + '\' of type ' + goog.typeOf(safeUrl));
+    return 'type_error:SafeUrl';
+  }
+};
+
+
+/**
+ * Creates a SafeUrl object from a compile-time constant string.
+ *
+ * Compile-time constant strings are inherently program-controlled and hence
+ * trusted.
+ *
+ * @param {!goog.string.Const} url A compile-time-constant string from which to
+ *         create a SafeUrl.
+ * @return {!goog.html.SafeUrl} A SafeUrl object initialized to {@code url}.
+ */
+goog.html.SafeUrl.fromConstant = function(url) {
+  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(
+      goog.string.Const.unwrap(url));
+};
+
+
+/**
+ * A pattern that matches Blob or data types that can have SafeUrls created
+ * from URL.createObjectURL(blob) or via a data: URI.
+ * @const
+ * @private
+ */
+goog.html.SAFE_MIME_TYPE_PATTERN_ = new RegExp(
+    '^(?:audio/(?:3gpp|3gpp2|aac|midi|mp4|mpeg|ogg|x-m4a|x-wav|webm)|' +
+        'image/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|' +
+        'text/csv|' +
+        'video/(?:mpeg|mp4|ogg|webm))$',
+    'i');
+
+
+/**
+ * Creates a SafeUrl wrapping a blob URL for the given {@code blob}.
+ *
+ * The blob URL is created with {@code URL.createObjectURL}. If the MIME type
+ * for {@code blob} is not of a known safe audio, image or video MIME type,
+ * then the SafeUrl will wrap {@link #INNOCUOUS_STRING}.
+ *
+ * @see http://www.w3.org/TR/FileAPI/#url
+ * @param {!Blob} blob
+ * @return {!goog.html.SafeUrl} The blob URL, or an innocuous string wrapped
+ *   as a SafeUrl.
+ */
+goog.html.SafeUrl.fromBlob = function(blob) {
+  var url = goog.html.SAFE_MIME_TYPE_PATTERN_.test(blob.type) ?
+      goog.fs.url.createObjectUrl(blob) :
+      goog.html.SafeUrl.INNOCUOUS_STRING;
+  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(url);
+};
+
+
+/**
+ * Matches a base-64 data URL, with the first match group being the MIME type.
+ * @const
+ * @private
+ */
+goog.html.DATA_URL_PATTERN_ = /^data:([^;,]*);base64,[a-z0-9+\/]+=*$/i;
+
+
+/**
+ * Creates a SafeUrl wrapping a data: URL, after validating it matches a
+ * known-safe audio, image or video MIME type.
+ *
+ * @param {string} dataUrl A valid base64 data URL with one of the whitelisted
+ *     audio, image or video MIME types.
+ * @return {!goog.html.SafeUrl} A matching safe URL, or {@link INNOCUOUS_STRING}
+ *     wrapped as a SafeUrl if it does not pass.
+ */
+goog.html.SafeUrl.fromDataUrl = function(dataUrl) {
+  // There's a slight risk here that a browser sniffs the content type if it
+  // doesn't know the MIME type and executes HTML within the data: URL. For this
+  // to cause XSS it would also have to execute the HTML in the same origin
+  // of the page with the link. It seems unlikely that both of these will
+  // happen, particularly in not really old IEs.
+  var match = dataUrl.match(goog.html.DATA_URL_PATTERN_);
+  var valid = match && goog.html.SAFE_MIME_TYPE_PATTERN_.test(match[1]);
+  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(
+      valid ? dataUrl : goog.html.SafeUrl.INNOCUOUS_STRING);
+};
+
+
+/**
+ * Creates a SafeUrl wrapping a tel: URL.
+ *
+ * @param {string} telUrl A tel URL.
+ * @return {!goog.html.SafeUrl} A matching safe URL, or {@link INNOCUOUS_STRING}
+ *     wrapped as a SafeUrl if it does not pass.
+ */
+goog.html.SafeUrl.fromTelUrl = function(telUrl) {
+  // There's a risk that a tel: URL could immediately place a call once
+  // clicked, without requiring user confirmation. For that reason it is
+  // handled in this separate function.
+  if (!goog.string.caseInsensitiveStartsWith(telUrl, 'tel:')) {
+    telUrl = goog.html.SafeUrl.INNOCUOUS_STRING;
+  }
+  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(
+      telUrl);
+};
+
+
+/**
+ * Creates a SafeUrl from TrustedResourceUrl. This is safe because
+ * TrustedResourceUrl is more tightly restricted than SafeUrl.
+ *
+ * @param {!goog.html.TrustedResourceUrl} trustedResourceUrl
+ * @return {!goog.html.SafeUrl}
+ */
+goog.html.SafeUrl.fromTrustedResourceUrl = function(trustedResourceUrl) {
+  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(
+      goog.html.TrustedResourceUrl.unwrap(trustedResourceUrl));
+};
+
+
+/**
+ * A pattern that recognizes a commonly useful subset of URLs that satisfy
+ * the SafeUrl contract.
+ *
+ * This regular expression matches a subset of URLs that will not cause script
+ * execution if used in URL context within a HTML document. Specifically, this
+ * regular expression matches if (comment from here on and regex copied from
+ * Soy's EscapingConventions):
+ * (1) Either a protocol in a whitelist (http, https, mailto or ftp).
+ * (2) or no protocol.  A protocol must be followed by a colon. The below
+ *     allows that by allowing colons only after one of the characters [/?#].
+ *     A colon after a hash (#) must be in the fragment.
+ *     Otherwise, a colon after a (?) must be in a query.
+ *     Otherwise, a colon after a single solidus (/) must be in a path.
+ *     Otherwise, a colon after a double solidus (//) must be in the authority
+ *     (before port).
+ *
+ * @private
+ * @const {!RegExp}
+ */
+goog.html.SAFE_URL_PATTERN_ =
+    /^(?:(?:https?|mailto|ftp):|[^:/?#]*(?:[/?#]|$))/i;
+
+
+/**
+ * Creates a SafeUrl object from {@code url}. If {@code url} is a
+ * goog.html.SafeUrl then it is simply returned. Otherwise the input string is
+ * validated to match a pattern of commonly used safe URLs.
+ *
+ * {@code url} may be a URL with the http, https, mailto or ftp scheme,
+ * or a relative URL (i.e., a URL without a scheme; specifically, a
+ * scheme-relative, absolute-path-relative, or path-relative URL).
+ *
+ * @see http://url.spec.whatwg.org/#concept-relative-url
+ * @param {string|!goog.string.TypedString} url The URL to validate.
+ * @return {!goog.html.SafeUrl} The validated URL, wrapped as a SafeUrl.
+ */
+goog.html.SafeUrl.sanitize = function(url) {
+  if (url instanceof goog.html.SafeUrl) {
+    return url;
+  } else if (url.implementsGoogStringTypedString) {
+    url = url.getTypedStringValue();
+  } else {
+    url = String(url);
+  }
+  if (!goog.html.SAFE_URL_PATTERN_.test(url)) {
+    url = goog.html.SafeUrl.INNOCUOUS_STRING;
+  }
+  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(url);
+};
+
+/**
+ * Creates a SafeUrl object from {@code url}. If {@code url} is a
+ * goog.html.SafeUrl then it is simply returned. Otherwise the input string is
+ * validated to match a pattern of commonly used safe URLs.
+ *
+ * {@code url} may be a URL with the http, https, mailto or ftp scheme,
+ * or a relative URL (i.e., a URL without a scheme; specifically, a
+ * scheme-relative, absolute-path-relative, or path-relative URL).
+ *
+ * This function asserts (using goog.asserts) that the URL matches this pattern.
+ * If it does not, in addition to failing the assert, an innocous URL will be
+ * returned.
+ *
+ * @see http://url.spec.whatwg.org/#concept-relative-url
+ * @param {string|!goog.string.TypedString} url The URL to validate.
+ * @return {!goog.html.SafeUrl} The validated URL, wrapped as a SafeUrl.
+ */
+goog.html.SafeUrl.sanitizeAssertUnchanged = function(url) {
+  if (url instanceof goog.html.SafeUrl) {
+    return url;
+  } else if (url.implementsGoogStringTypedString) {
+    url = url.getTypedStringValue();
+  } else {
+    url = String(url);
+  }
+  if (!goog.asserts.assert(goog.html.SAFE_URL_PATTERN_.test(url))) {
+    url = goog.html.SafeUrl.INNOCUOUS_STRING;
+  }
+  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(url);
+};
+
+
+
+/**
+ * Type marker for the SafeUrl type, used to implement additional run-time
+ * type checking.
+ * @const {!Object}
+ * @private
+ */
+goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ = {};
+
+
+/**
+ * Package-internal utility method to create SafeUrl instances.
+ *
+ * @param {string} url The string to initialize the SafeUrl object with.
+ * @return {!goog.html.SafeUrl} The initialized SafeUrl object.
+ * @package
+ */
+goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse = function(
+    url) {
+  var safeUrl = new goog.html.SafeUrl();
+  safeUrl.privateDoNotAccessOrElseSafeHtmlWrappedValue_ = url;
+  return safeUrl;
+};
+
+
+/**
+ * A SafeUrl corresponding to the special about:blank url.
+ * @const {!goog.html.SafeUrl}
+ */
+goog.html.SafeUrl.ABOUT_BLANK =
+    goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(
+        'about:blank');
diff --git a/src/assets/viz/2/goog/html/trustedresourceurl.js b/src/assets/viz/2/goog/html/trustedresourceurl.js
new file mode 100644
index 0000000..c043ef1
--- /dev/null
+++ b/src/assets/viz/2/goog/html/trustedresourceurl.js
@@ -0,0 +1,408 @@
+// Copyright 2013 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview The TrustedResourceUrl type and its builders.
+ *
+ * TODO(xtof): Link to document stating type contract.
+ */
+
+goog.provide('goog.html.TrustedResourceUrl');
+
+goog.require('goog.asserts');
+goog.require('goog.i18n.bidi.Dir');
+goog.require('goog.i18n.bidi.DirectionalString');
+goog.require('goog.string.Const');
+goog.require('goog.string.TypedString');
+
+
+
+/**
+ * A URL which is under application control and from which script, CSS, and
+ * other resources that represent executable code, can be fetched.
+ *
+ * Given that the URL can only be constructed from strings under application
+ * control and is used to load resources, bugs resulting in a malformed URL
+ * should not have a security impact and are likely to be easily detectable
+ * during testing. Given the wide number of non-RFC compliant URLs in use,
+ * stricter validation could prevent some applications from being able to use
+ * this type.
+ *
+ * Instances of this type must be created via the factory method,
+ * ({@code fromConstant}, {@code fromConstants}, {@code format} or {@code
+ * formatWithParams}), and not by invoking its constructor. The constructor
+ * intentionally takes no parameters and the type is immutable; hence only a
+ * default instance corresponding to the empty string can be obtained via
+ * constructor invocation.
+ *
+ * @see goog.html.TrustedResourceUrl#fromConstant
+ * @constructor
+ * @final
+ * @struct
+ * @implements {goog.i18n.bidi.DirectionalString}
+ * @implements {goog.string.TypedString}
+ */
+goog.html.TrustedResourceUrl = function() {
+  /**
+   * The contained value of this TrustedResourceUrl.  The field has a purposely
+   * ugly name to make (non-compiled) code that attempts to directly access this
+   * field stand out.
+   * @private {string}
+   */
+  this.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_ = '';
+
+  /**
+   * A type marker used to implement additional run-time type checking.
+   * @see goog.html.TrustedResourceUrl#unwrap
+   * @const {!Object}
+   * @private
+   */
+  this.TRUSTED_RESOURCE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ =
+      goog.html.TrustedResourceUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.TrustedResourceUrl.prototype.implementsGoogStringTypedString = true;
+
+
+/**
+ * Returns this TrustedResourceUrl's value as a string.
+ *
+ * IMPORTANT: In code where it is security relevant that an object's type is
+ * indeed {@code TrustedResourceUrl}, use
+ * {@code goog.html.TrustedResourceUrl.unwrap} instead of this method. If in
+ * doubt, assume that it's security relevant. In particular, note that
+ * goog.html functions which return a goog.html type do not guarantee that
+ * the returned instance is of the right type. For example:
+ *
+ * <pre>
+ * var fakeSafeHtml = new String('fake');
+ * fakeSafeHtml.__proto__ = goog.html.SafeHtml.prototype;
+ * var newSafeHtml = goog.html.SafeHtml.htmlEscape(fakeSafeHtml);
+ * // newSafeHtml is just an alias for fakeSafeHtml, it's passed through by
+ * // goog.html.SafeHtml.htmlEscape() as fakeSafeHtml instanceof
+ * // goog.html.SafeHtml.
+ * </pre>
+ *
+ * @see goog.html.TrustedResourceUrl#unwrap
+ * @override
+ */
+goog.html.TrustedResourceUrl.prototype.getTypedStringValue = function() {
+  return this.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_;
+};
+
+
+/**
+ * @override
+ * @const
+ */
+goog.html.TrustedResourceUrl.prototype.implementsGoogI18nBidiDirectionalString =
+    true;
+
+
+/**
+ * Returns this URLs directionality, which is always {@code LTR}.
+ * @override
+ */
+goog.html.TrustedResourceUrl.prototype.getDirection = function() {
+  return goog.i18n.bidi.Dir.LTR;
+};
+
+
+if (goog.DEBUG) {
+  /**
+   * Returns a debug string-representation of this value.
+   *
+   * To obtain the actual string value wrapped in a TrustedResourceUrl, use
+   * {@code goog.html.TrustedResourceUrl.unwrap}.
+   *
+   * @see goog.html.TrustedResourceUrl#unwrap
+   * @override
+   */
+  goog.html.TrustedResourceUrl.prototype.toString = function() {
+    return 'TrustedResourceUrl{' +
+        this.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_ + '}';
+  };
+}
+
+
+/**
+ * Performs a runtime check that the provided object is indeed a
+ * TrustedResourceUrl object, and returns its value.
+ *
+ * @param {!goog.html.TrustedResourceUrl} trustedResourceUrl The object to
+ *     extract from.
+ * @return {string} The trustedResourceUrl object's contained string, unless
+ *     the run-time type check fails. In that case, {@code unwrap} returns an
+ *     innocuous string, or, if assertions are enabled, throws
+ *     {@code goog.asserts.AssertionError}.
+ */
+goog.html.TrustedResourceUrl.unwrap = function(trustedResourceUrl) {
+  // Perform additional Run-time type-checking to ensure that
+  // trustedResourceUrl is indeed an instance of the expected type.  This
+  // provides some additional protection against security bugs due to
+  // application code that disables type checks.
+  // Specifically, the following checks are performed:
+  // 1. The object is an instance of the expected type.
+  // 2. The object is not an instance of a subclass.
+  // 3. The object carries a type marker for the expected type. "Faking" an
+  // object requires a reference to the type marker, which has names intended
+  // to stand out in code reviews.
+  if (trustedResourceUrl instanceof goog.html.TrustedResourceUrl &&
+      trustedResourceUrl.constructor === goog.html.TrustedResourceUrl &&
+      trustedResourceUrl
+              .TRUSTED_RESOURCE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ ===
+          goog.html.TrustedResourceUrl
+              .TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_) {
+    return trustedResourceUrl
+        .privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_;
+  } else {
+    goog.asserts.fail('expected object of type TrustedResourceUrl, got \'' +
+        trustedResourceUrl + '\' of type ' + goog.typeOf(trustedResourceUrl));
+    return 'type_error:TrustedResourceUrl';
+  }
+};
+
+
+/**
+ * Creates a TrustedResourceUrl from a format string and arguments.
+ *
+ * The arguments for interpolation into the format string map labels to values.
+ * Values of type `goog.string.Const` are interpolated without modifcation.
+ * Values of other types are cast to string and encoded with
+ * encodeURIComponent.
+ *
+ * `%{<label>}` markers are used in the format string to indicate locations
+ * to be interpolated with the valued mapped to the given label. `<label>`
+ * must contain only alphanumeric and `_` characters.
+ *
+ * The format string must start with one of the following:
+ * - `https://<origin>/`
+ * - `//<origin>/`
+ * - `/<pathStart>`
+ * - `about:blank`
+ *
+ * `<origin>` must contain only alphanumeric or any of the following: `-.:[]`.
+ * `<pathStart>` is any character except `/` and `\`.
+ *
+ * Example usage:
+ *
+ *    var url = goog.html.TrustedResourceUrl.format(goog.string.Const.from(
+ *        'https://www.google.com/search?q=%{query}), {'query': searchTerm});
+ *
+ *    var url = goog.html.TrustedResourceUrl.format(goog.string.Const.from(
+ *        '//www.youtube.com/v/%{videoId}?hl=en&fs=1%{autoplay}'), {
+ *        'videoId': videoId,
+ *        'autoplay': opt_autoplay ?
+ *            goog.string.Const.EMPTY : goog.string.Const.from('&autoplay=1')
+ *    });
+ *
+ * While this function can be used to create a TrustedResourceUrl from only
+ * constants, fromConstant() and fromConstants() are generally preferable for
+ * that purpose.
+ *
+ * @param {!goog.string.Const} format The format string.
+ * @param {!Object<string, (string|number|!goog.string.Const)>} args Mapping
+ *     of labels to values to be interpolated into the format string.
+ *     goog.string.Const values are interpolated without encoding.
+ * @return {!goog.html.TrustedResourceUrl}
+ * @throws {!Error} On an invalid format string or if a label used in the
+ *     the format string is not present in args.
+ */
+goog.html.TrustedResourceUrl.format = function(format, args) {
+  var result = goog.html.TrustedResourceUrl.format_(format, args);
+  return goog.html.TrustedResourceUrl
+      .createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(result);
+};
+
+
+/**
+ * String version of TrustedResourceUrl.format.
+ * @param {!goog.string.Const} format
+ * @param {!Object<string, (string|number|!goog.string.Const)>} args
+ * @return {string}
+ * @throws {!Error}
+ * @private
+ */
+goog.html.TrustedResourceUrl.format_ = function(format, args) {
+  var formatStr = goog.string.Const.unwrap(format);
+  if (!goog.html.TrustedResourceUrl.BASE_URL_.test(formatStr)) {
+    throw new Error('Invalid TrustedResourceUrl format: ' + formatStr);
+  }
+  return formatStr.replace(
+      goog.html.TrustedResourceUrl.FORMAT_MARKER_, function(match, id) {
+        if (!Object.prototype.hasOwnProperty.call(args, id)) {
+          throw new Error(
+              'Found marker, "' + id + '", in format string, "' + formatStr +
+              '", but no valid label mapping found ' +
+              'in args: ' + JSON.stringify(args));
+        }
+        var arg = args[id];
+        if (arg instanceof goog.string.Const) {
+          return goog.string.Const.unwrap(arg);
+        } else {
+          return encodeURIComponent(String(arg));
+        }
+      });
+};
+
+
+/**
+ * @private @const {!RegExp}
+ */
+goog.html.TrustedResourceUrl.FORMAT_MARKER_ = /%{(\w+)}/g;
+
+
+/**
+ * The URL must be absolute, scheme-relative or path-absolute. So it must
+ * start with:
+ * - https:// followed by allowed origin characters.
+ * - // followed by allowed origin characters.
+ * - / not followed by / or \. There will only be an absolute path.
+ *
+ * Based on
+ * https://url.spec.whatwg.org/commit-snapshots/56b74ce7cca8883eab62e9a12666e2fac665d03d/#url-parsing
+ * an initial / which is not followed by another / or \ will end up in the "path
+ * state" and from there it can only go to "fragment state" and "query state".
+ *
+ * We don't enforce a well-formed domain name. So '.' or '1.2' are valid.
+ * That's ok because the origin comes from a compile-time constant.
+ *
+ * A regular expression is used instead of goog.uri for several reasons:
+ * - Strictness. E.g. we don't want any userinfo component and we don't
+ *   want '/./, nor \' in the first path component.
+ * - Small trusted base. goog.uri is generic and might need to change,
+ *   reasoning about all the ways it can parse a URL now and in the future
+ *   is error-prone.
+ * - Code size. We expect many calls to .format(), many of which might
+ *   not be using goog.uri.
+ * - Simplicity. Using goog.uri would likely not result in simpler nor shorter
+ *   code.
+ * @private @const {!RegExp}
+ */
+goog.html.TrustedResourceUrl.BASE_URL_ =
+    /^(?:https:)?\/\/[0-9a-z.:[\]-]+\/|^\/[^\/\\]|^about:blank(#|$)/i;
+
+
+/**
+ * Formats the URL same as TrustedResourceUrl.format and then adds extra URL
+ * parameters.
+ *
+ * Example usage:
+ *
+ *     // Creates '//www.youtube.com/v/abc?autoplay=1' for videoId='abc' and
+ *     // opt_autoplay=1. Creates '//www.youtube.com/v/abc' for videoId='abc'
+ *     // and opt_autoplay=undefined.
+ *     var url = goog.html.TrustedResourceUrl.formatWithParams(
+ *         goog.string.Const.from('//www.youtube.com/v/%{videoId}'),
+ *         {'videoId': videoId},
+ *         {'autoplay': opt_autoplay});
+ *
+ * @param {!goog.string.Const} format The format string.
+ * @param {!Object<string, (string|number|!goog.string.Const)>} args Mapping
+ *     of labels to values to be interpolated into the format string.
+ *     goog.string.Const values are interpolated without encoding.
+ * @param {!Object<string, *>} params Parameters to add to URL. Parameters with
+ *     value {@code null} or {@code undefined} are skipped. Both keys and values
+ *     are encoded. Note that JavaScript doesn't guarantee the order of values
+ *     in an object which might result in non-deterministic order of the
+ *     parameters. However, browsers currently preserve the order.
+ * @return {!goog.html.TrustedResourceUrl}
+ * @throws {!Error} On an invalid format string or if a label used in the
+ *     the format string is not present in args.
+ */
+goog.html.TrustedResourceUrl.formatWithParams = function(format, args, params) {
+  var url = goog.html.TrustedResourceUrl.format_(format, args);
+  var separator = /\?/.test(url) ? '&' : '?';
+  for (var key in params) {
+    if (params[key] == null) {
+      continue;
+    }
+    url += separator + encodeURIComponent(key) + '=' +
+        encodeURIComponent(String(params[key]));
+    separator = '&';
+  }
+  return goog.html.TrustedResourceUrl
+      .createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(url);
+};
+
+
+/**
+ * Creates a TrustedResourceUrl object from a compile-time constant string.
+ *
+ * Compile-time constant strings are inherently program-controlled and hence
+ * trusted.
+ *
+ * @param {!goog.string.Const} url A compile-time-constant string from which to
+ *     create a TrustedResourceUrl.
+ * @return {!goog.html.TrustedResourceUrl} A TrustedResourceUrl object
+ *     initialized to {@code url}.
+ */
+goog.html.TrustedResourceUrl.fromConstant = function(url) {
+  return goog.html.TrustedResourceUrl
+      .createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(
+          goog.string.Const.unwrap(url));
+};
+
+
+/**
+ * Creates a TrustedResourceUrl object from a compile-time constant strings.
+ *
+ * Compile-time constant strings are inherently program-controlled and hence
+ * trusted.
+ *
+ * @param {!Array<!goog.string.Const>} parts Compile-time-constant strings from
+ *     which to create a TrustedResourceUrl.
+ * @return {!goog.html.TrustedResourceUrl} A TrustedResourceUrl object
+ *     initialized to concatenation of {@code parts}.
+ */
+goog.html.TrustedResourceUrl.fromConstants = function(parts) {
+  var unwrapped = '';
+  for (var i = 0; i < parts.length; i++) {
+    unwrapped += goog.string.Const.unwrap(parts[i]);
+  }
+  return goog.html.TrustedResourceUrl
+      .createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(unwrapped);
+};
+
+
+/**
+ * Type marker for the TrustedResourceUrl type, used to implement additional
+ * run-time type checking.
+ * @const {!Object}
+ * @private
+ */
+goog.html.TrustedResourceUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_ = {};
+
+
+/**
+ * Package-internal utility method to create TrustedResourceUrl instances.
+ *
+ * @param {string} url The string to initialize the TrustedResourceUrl object
+ *     with.
+ * @return {!goog.html.TrustedResourceUrl} The initialized TrustedResourceUrl
+ *     object.
+ * @package
+ */
+goog.html.TrustedResourceUrl
+    .createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse = function(url) {
+  var trustedResourceUrl = new goog.html.TrustedResourceUrl();
+  trustedResourceUrl.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_ =
+      url;
+  return trustedResourceUrl;
+};
diff --git a/src/assets/viz/2/goog/html/uncheckedconversions.js b/src/assets/viz/2/goog/html/uncheckedconversions.js
new file mode 100644
index 0000000..e96697c
--- /dev/null
+++ b/src/assets/viz/2/goog/html/uncheckedconversions.js
@@ -0,0 +1,228 @@
+// Copyright 2013 The Closure Library Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS-IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/**
+ * @fileoverview Unchecked conversions to create values of goog.html types from
+ * plain strings.  Use of these functions could potentially result in instances
+ * of goog.html types that violate their type contracts, and hence result in
+ * security vulnerabilties.
+ *
+ * Therefore, all uses of the methods herein must be carefully security
+ * reviewed.  Avoid use of the methods in this file whenever possible; instead
+ * prefer to create instances of goog.html types using inherently safe builders
+ * or template systems.
+ *
+ *
+ *
+ * @visibility {//closure/goog/html:approved_for_unchecked_conversion}
+ * @visibility {//closure/goog/bin/sizetests:__pkg__}
+ */
+
+
+goog.provide('goog.html.uncheckedconversions');
+
+goog.require('goog.asserts');
+goog.require('goog.html.SafeHtml');
+goog.require('goog.html.SafeScript');
+goog.require('goog.html.SafeStyle');
+goog.require('goog.html.SafeStyleSheet');
+goog.require('goog.html.SafeUrl');
+goog.require('goog.html.TrustedResourceUrl');
+goog.require('goog.string');
+goog.require('goog.string.Const');
+
+
+/**
+ * Performs an "unchecked conversion" to SafeHtml from a plain string that is
+ * known to satisfy the SafeHtml type contract.
+ *
+ * IMPORTANT: Uses of this method must be carefully security-reviewed to ensure
+ * that the value of {@code html} satisfies the SafeHtml type contract in all
+ * possible program states.
+ *
+ *
+ * @param {!goog.string.Const} justification A constant string explaining why
+ *     this use of this method is safe. May include a security review ticket
+ *     number.
+ * @param {string} html A string that is claimed to adhere to the SafeHtml
+ *     contract.
+ * @param {?goog.i18n.bidi.Dir=} opt_dir The optional directionality of the
+ *     SafeHtml to be constructed. A null or undefined value signifies an
+ *     unknown directionality.
+ * @return {!goog.html.SafeHtml} The value of html, wrapped in a SafeHtml
+ *     object.
+ */
+goog.html.uncheckedconversions.safeHtmlFromStringKnownToSatisfyTypeContract =
+    function(justification, html, opt_dir) {
+  // unwrap() called inside an assert so that justification can be optimized
+  // away in production code.
+  goog.asserts.assertString(
+      goog.string.Const.unwrap(justification), 'must provide justification');
+  goog.asserts.assert(
+      !goog.string.isEmptyOrWhitespace(goog.string.Const.unwrap(justification)),
+      'must provide non-empty justification');
+  return goog.html.SafeHtml.createSafeHtmlSecurityPrivateDoNotAccessOrElse(
+      html, opt_dir || null);
+};
+
+
+/**
+ * Performs an "unchecked conversion" to SafeScript from a plain string that is
+ * known to satisfy the SafeScript type contract.
+ *
+ * IMPORTANT: Uses of this method must be carefully security-reviewed to ensure
+ * that the value of {@code script} satisfies the SafeScript type contract in
+ * all possible program states.
+ *
+ *
+ * @param {!goog.string.Const} justification A constant string explaining why
+ *     this use of this method is safe. May include a security review ticket
+ *     number.
+ * @param {string} script The string to wrap as a SafeScript.
+ * @return {!goog.html.SafeScript} The value of {@code script}, wrapped in a
+ *     SafeScript object.
+ */
+goog.html.uncheckedconversions.safeScriptFromStringKnownToSatisfyTypeContract =
+    function(justification, script) {
+  // unwrap() called inside an assert so that justification can be optimized
+  // away in production code.
+  goog.asserts.assertString(
+      goog.string.Const.unwrap(justification), 'must provide justification');
+  goog.asserts.assert(
+      !goog.string.isEmptyOrWhitespace(goog.string.Const.unwrap(justification)),
+      'must provide non-empty justification');
+  return goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse(
+      script);
+};
+
+
+/**
+ * Performs an "unchecked conversion" to SafeStyle from a plain string that is
+ * known to satisfy the SafeStyle type contract.
+ *
+ * IMPORTANT: Uses of this method must be carefully security-reviewed to ensure
+ * that the value of {@code style} satisfies the SafeStyle type contract in all
+ * possible program states.
+ *
+ *
+ * @param {!goog.string.Const} justification A constant string explaining why
+ *     this use of this method is safe. May include a security review ticket
+ *     number.
+ * @param {string} style The string to wrap as a SafeStyle.
+ * @return {!goog.html.SafeStyle} The value of {@code style}, wrapped in a
+ *     SafeStyle object.
+ */
+goog.html.uncheckedconversions.safeStyleFromStringKnownToSatisfyTypeContract =
+    function(justification, style) {
+  // unwrap() called inside an assert so that justification can be optimized
+  // away in production code.
+  goog.asserts.assertString(
+      goog.string.Const.unwrap(justification), 'must provide justification');
+  goog.asserts.assert(
+      !goog.string.isEmptyOrWhitespace(goog.string.Const.unwrap(justification)),
+      'must provide non-empty justification');
+  return goog.html.SafeStyle.createSafeStyleSecurityPrivateDoNotAccessOrElse(
+      style);
+};
+
+
+/**
+ * Performs an "unchecked conversion" to SafeStyleSheet from a plain string
+ * that is known to satisfy the SafeStyleSheet type contract.
+ *
+ * IMPORTANT: Uses of this method must be carefully security-reviewed to ensure
+ * that the value of {@code styleSheet} satisfies the SafeStyleSheet type
+ * contract in all possible program states.
+ *
+ *
+ * @param {!goog.string.Const} justification A constant string explaining why
+ *     this use of this method is safe. May include a security review ticket
+ *     number.
+ * @param {string} styleSheet The string to wrap as a SafeStyleSheet.
+ * @return {!goog.html.SafeStyleSheet} The value of {@code styleSheet}, wrapped
+ *     in a SafeStyleSheet object.
+ */
+goog.html.uncheckedconversions
+    .safeStyleSheetFromStringKnownToSatisfyTypeContract = function(
+    justification, styleSheet) {
+  // unwrap() called inside an assert so that justification can be optimized
+  // away in production code.
+  goog.asserts.assertString(
+      goog.string.Const.unwrap(justification), 'must provide justification');
+  goog.asserts.assert(
+      !goog.string.isEmptyOrWhitespace(goog.string.Const.unwrap(justification)),
+      'must provide non-empty justification');
+  return goog.html.SafeStyleSheet
+      .createSafeStyleSheetSecurityPrivateDoNotAccessOrElse(styleSheet);
+};
+
+
+/**
+ * Performs an "unchecked conversion" to SafeUrl from a plain string that is
+ * known to satisfy the SafeUrl type contract.
+ *
+ * IMPORTANT: Uses of this method must be carefully security-reviewed to ensure
+ * that the value of {@code url} satisfies the SafeUrl type contract in all
+ * possible program states.
+ *
+ *
+ * @param {!goog.string.Const} justification A constant string explaining why
+ *     this use of this method is safe. May include a security review ticket
+ *     number.
+ * @param {string} url The string to wrap as a SafeUrl.
+ * @return {!goog.html.SafeUrl} The value of {@code url}, wrapped in a SafeUrl
+ *     object.
+ */
+goog.html.uncheckedconversions.safeUrlFromStringKnownToSatisfyTypeContract =
+    function(justification, url) {
+  // unwrap() called inside an assert so that justification can be optimized
+  // away in production code.
+  goog.asserts.assertString(
+      goog.string.Const.unwrap(justification), 'must provide justification');
+  goog.asserts.assert(
+      !goog.string.isEmptyOrWhitespace(goog.string.Const.unwrap(justification)),
+      'must provide non-empty justification');
+  return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(url);
+};
+
+
+/**
+ * Performs an "unchecked conversion" to TrustedResourceUrl from a plain string
+ * that is known to satisfy the TrustedResourceUrl type contract.
+ *
+ * IMPORTANT: Uses of this method must be carefully security-reviewed to ensure
+ * that the value of {@code url} satisfies the TrustedResourceUrl type contract
+ * in all possible program states.
+ *
+ *
+ * @param {!goog.string.Const} justification A constant string explaining why
+ *     this use of this method is safe. May include a security review ticket
+ *     number.
+ * @param {string} url The string to wrap as a TrustedResourceUrl.
+ * @return {!goog.html.TrustedResourceUrl} The value of {@code url}, wrapped in
+ *     a TrustedResourceUrl object.
+ */
+goog.html.uncheckedconversions
+    .trustedResourceUrlFromStringKnownToSatisfyTypeContract = function(
+    justification, url) {
+  // unwrap() called inside an assert so that justification can be optimized
+  // away in production code.
+  goog.asserts.assertString(
+      goog.string.Const.unwrap(justification), 'must provide justification');
+  goog.asserts.assert(
+      !goog.string.isEmptyOrWhitespace(goog.string.Const.unwrap(justification)),
+      'must provide non-empty justification');
+  return goog.html.TrustedResourceUrl
+      .createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(url);
+};