update viz 2 to use the newest version, which has some performance improvements and is easier to read the code for. also update the description

1 files changed, 408 insertions, 214 deletions

diff --git a/assets/viz/2/goog/base.js b/assets/viz/2/goog/base.js
index 97a9947..46b2f09 100644
--- a/assets/viz/2/goog/base.js
+++ b/assets/viz/2/goog/base.js
@@ -15,19 +15,19 @@
 /**
  * @fileoverview Bootstrap for the Google JS Library (Closure).
  *
- * In uncompiled mode base.js will write out Closure's deps file, unless the
- * global <code>CLOSURE_NO_DEPS</code> is set to true.  This allows projects to
- * include their own deps file(s) from different locations.
+ * In uncompiled mode base.js will attempt to load Closure's deps file, unless
+ * the global <code>CLOSURE_NO_DEPS</code> is set to true.  This allows projects
+ * to include their own deps file(s) from different locations.
  *
- * @author arv@google.com (Erik Arvidsson)
+ * Avoid including base.js more than once. This is strictly discouraged and not
+ * supported. goog.require(...) won't work properly in that case.
  *
  * @provideGoog
  */
 
 
 /**
- * @define {boolean} Overridden to true by the compiler when
- *     --process_closure_primitives is specified.
+ * @define {boolean} Overridden to true by the compiler.
  */
 var COMPILED = false;
 
@@ -90,8 +90,6 @@ goog.global.CLOSURE_DEFINES;
 
 /**
  * Returns true if the specified value is not undefined.
- * WARNING: Do not use this to test if an object has a property. Use the in
- * operator instead.
  *
  * @param {?} val Variable to test.
  * @return {boolean} Whether variable is defined.
@@ -102,6 +100,35 @@ goog.isDef = function(val) {
   return val !== void 0;
 };
 
+/**
+ * Returns true if the specified value is a string.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is a string.
+ */
+goog.isString = function(val) {
+  return typeof val == 'string';
+};
+
+
+/**
+ * Returns true if the specified value is a boolean.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is boolean.
+ */
+goog.isBoolean = function(val) {
+  return typeof val == 'boolean';
+};
+
+
+/**
+ * Returns true if the specified value is a number.
+ * @param {?} val Variable to test.
+ * @return {boolean} Whether variable is a number.
+ */
+goog.isNumber = function(val) {
+  return typeof val == 'number';
+};
+
 
 /**
  * Builds an object structure for the provided namespace path, ensuring that
@@ -111,7 +138,7 @@ goog.isDef = function(val) {
  * @param {string} name name of the object that this file defines.
  * @param {*=} opt_object the object to expose at the end of the path.
  * @param {Object=} opt_objectToExportTo The object to add the path to; default
- *     is |goog.global|.
+ *     is `goog.global`.
  * @private
  */
 goog.exportPath_ = function(name, opt_object, opt_objectToExportTo) {
@@ -125,17 +152,11 @@ goog.exportPath_ = function(name, opt_object, opt_objectToExportTo) {
     cur.execScript('var ' + parts[0]);
   }
 
-  // Certain browsers cannot parse code in the form for((a in b); c;);
-  // This pattern is produced by the JSCompiler when it collapses the
-  // statement above into the conditional loop below. To prevent this from
-  // happening, use a for-loop and reserve the init logic as below.
-
-  // Parentheses added to eliminate strict JS warning in Firefox.
   for (var part; parts.length && (part = parts.shift());) {
     if (!parts.length && goog.isDef(opt_object)) {
       // last part and we have an object; use it
       cur[part] = opt_object;
-    } else if (cur[part]) {
+    } else if (cur[part] && cur[part] !== Object.prototype[part]) {
       cur = cur[part];
     } else {
       cur = cur[part] = {};
@@ -158,11 +179,16 @@ goog.define = function(name, defaultValue) {
   var value = defaultValue;
   if (!COMPILED) {
     if (goog.global.CLOSURE_UNCOMPILED_DEFINES &&
+        // Anti DOM-clobbering runtime check (b/37736576).
+        /** @type {?} */ (goog.global.CLOSURE_UNCOMPILED_DEFINES).nodeType ===
+            undefined &&
         Object.prototype.hasOwnProperty.call(
             goog.global.CLOSURE_UNCOMPILED_DEFINES, name)) {
       value = goog.global.CLOSURE_UNCOMPILED_DEFINES[name];
     } else if (
         goog.global.CLOSURE_DEFINES &&
+        // Anti DOM-clobbering runtime check (b/37736576).
+        /** @type {?} */ (goog.global.CLOSURE_DEFINES).nodeType === undefined &&
         Object.prototype.hasOwnProperty.call(
             goog.global.CLOSURE_DEFINES, name)) {
       value = goog.global.CLOSURE_DEFINES[name];
@@ -174,11 +200,12 @@ goog.define = function(name, defaultValue) {
 
 /**
  * @define {boolean} DEBUG is provided as a convenience so that debugging code
- * that should not be included in a production js_binary can be easily stripped
- * by specifying --define goog.DEBUG=false to the JSCompiler. For example, most
- * toString() methods should be declared inside an "if (goog.DEBUG)" conditional
- * because they are generally used for debugging purposes and it is difficult
- * for the JSCompiler to statically determine whether they are used.
+ * that should not be included in a production. It can be easily stripped
+ * by specifying --define goog.DEBUG=false to the Closure Compiler aka
+ * JSCompiler. For example, most toString() methods should be declared inside an
+ * "if (goog.DEBUG)" conditional because they are generally used for debugging
+ * purposes and it is difficult for the JSCompiler to statically determine
+ * whether they are used.
  */
 goog.define('goog.DEBUG', true);
 
@@ -186,7 +213,7 @@ goog.define('goog.DEBUG', true);
 /**
  * @define {string} LOCALE defines the locale being used for compilation. It is
  * used to select locale specific data to be compiled in js binary. BUILD rule
- * can specify this value by "--define goog.LOCALE=<locale_name>" as JSCompiler
+ * can specify this value by "--define goog.LOCALE=<locale_name>" as a compiler
  * option.
  *
  * Take into account that the locale code format is important. You should use
@@ -200,7 +227,8 @@ goog.define('goog.DEBUG', true);
  * For language codes you should use values defined by ISO 693-1. See it here
  * http://www.w3.org/WAI/ER/IG/ert/iso639.htm. There is only one exception from
  * this rule: the Hebrew language. For legacy reasons the old code (iw) should
- * be used instead of the new code (he), see http://wiki/Main/IIISynonyms.
+ * be used instead of the new code (he).
+ *
  */
 goog.define('goog.LOCALE', 'en');  // default to en
 
@@ -214,7 +242,7 @@ goog.define('goog.LOCALE', 'en');  // default to en
  *
  * If your JavaScript can be loaded by a third party site and you are wary about
  * relying on non-standard implementations, specify
- * "--define goog.TRUSTED_SITE=false" to the JSCompiler.
+ * "--define goog.TRUSTED_SITE=false" to the compiler.
  */
 goog.define('goog.TRUSTED_SITE', true);
 
@@ -345,6 +373,7 @@ goog.VALID_MODULE_RE_ = /^[a-zA-Z_$][a-zA-Z0-9._$]*$/;
  *
  * @param {string} name Namespace provided by this file in the form
  *     "goog.package.part", is expected but not required.
+ * @return {void}
  */
 goog.module = function(name) {
   if (!goog.isString(name) || !name ||
@@ -352,7 +381,13 @@ goog.module = function(name) {
     throw Error('Invalid module identifier');
   }
   if (!goog.isInModuleLoader_()) {
-    throw Error('Module ' + name + ' has been loaded incorrectly.');
+    throw Error(
+        'Module ' + name + ' has been loaded incorrectly. Note, ' +
+        'modules cannot be loaded as normal scripts. They require some kind of ' +
+        'pre-processing step. You\'re likely trying to load a module via a ' +
+        'script tag or as a part of a concatenated bundle without rewriting the ' +
+        'module. For more info see: ' +
+        'https://github.com/google/closure-library/wiki/goog.module:-an-ES6-module-like-alternative-to-goog.provide.');
   }
   if (goog.moduleLoaderState_.moduleName) {
     throw Error('goog.module may only be called once per module.');
@@ -393,14 +428,14 @@ goog.module.get = function(name) {
  */
 goog.module.getInternal_ = function(name) {
   if (!COMPILED) {
-    if (goog.isProvided_(name)) {
-      // goog.require only return a value with-in goog.module files.
-      return name in goog.loadedModules_ ? goog.loadedModules_[name] :
-                                           goog.getObjectByName(name);
-    } else {
-      return null;
+    if (name in goog.loadedModules_) {
+      return goog.loadedModules_[name];
+    } else if (!goog.implicitNamespaces_[name]) {
+      var ns = goog.getObjectByName(name);
+      return ns != null ? ns : null;
     }
   }
+  return null;
 };
 
 
@@ -473,6 +508,9 @@ goog.setTestOnly = function(opt_message) {
  * into the JavaScript binary. If it is required elsewhere, it will be type
  * checked as normal.
  *
+ * Before using goog.forwardDeclare, please read the documentation at
+ * https://github.com/google/closure-compiler/wiki/Bad-Type-Annotation to
+ * understand the options and tradeoffs when working with forward declarations.
  *
  * @param {string} name The namespace to forward declare in the form of
  *     "goog.package.part".
@@ -612,7 +650,7 @@ goog.addDependency = function(relPath, provides, requires, opt_loadFlags) {
 // Externally: https://developers.google.com/closure/library/docs/depswriter
 //
 // Because of legacy clients, the DOM loader can't be easily removed from
-// base.js.  Work is being done to make it disableable or replaceable for
+// base.js.  Work was done to make it disableable or replaceable for
 // different environments (DOM-less JavaScript interpreters like Rhino or V8,
 // for example). See bootstrap/ for more information.
 
@@ -644,8 +682,7 @@ goog.logToConsole_ = function(msg) {
 /**
  * Implements a system for the dynamic resolution of dependencies that works in
  * parallel with the BUILD system. Note that all calls to goog.require will be
- * stripped by the JSCompiler when the --process_closure_primitives option is
- * used.
+ * stripped by the compiler.
  * @see goog.provide
  * @param {string} name Namespace to include (as was given in goog.provide()) in
  *     the form "goog.package.part".
@@ -653,7 +690,7 @@ goog.logToConsole_ = function(msg) {
  *     module otherwise null.
  */
 goog.require = function(name) {
-  // If the object already exists we do not need do do anything.
+  // If the object already exists we do not need to do anything.
   if (!COMPILED) {
     if (goog.ENABLE_DEBUG_LOADER && goog.IS_OLD_IE_) {
       goog.maybeProcessDeferredDep_(name);
@@ -662,23 +699,20 @@ goog.require = function(name) {
     if (goog.isProvided_(name)) {
       if (goog.isInModuleLoader_()) {
         return goog.module.getInternal_(name);
-      } else {
-        return null;
       }
-    }
-
-    if (goog.ENABLE_DEBUG_LOADER) {
+    } else if (goog.ENABLE_DEBUG_LOADER) {
       var path = goog.getPathFromDeps_(name);
       if (path) {
         goog.writeScripts_(path);
-        return null;
+      } else {
+        var errorMessage = 'goog.require could not find: ' + name;
+        goog.logToConsole_(errorMessage);
+
+        throw Error(errorMessage);
       }
     }
 
-    var errorMessage = 'goog.require could not find: ' + name;
-    goog.logToConsole_(errorMessage);
-
-    throw Error(errorMessage);
+    return null;
   }
 };
 
@@ -698,7 +732,8 @@ goog.global.CLOSURE_BASE_PATH;
 
 
 /**
- * Whether to write out Closure's deps file. By default, the deps are written.
+ * Whether to attempt to load Closure's deps file. By default, when uncompiled,
+ * deps files will attempt to be loaded.
  * @type {boolean|undefined}
  */
 goog.global.CLOSURE_NO_DEPS;
@@ -731,9 +766,6 @@ goog.nullFunction = function() {};
  * Now if a subclass of Foo fails to override bar(), an error will be thrown
  * when bar() is invoked.
  *
- * Note: This does not take the name of the function to override as an argument
- * because that would make it more difficult to obfuscate our JavaScript code.
- *
  * @type {!Function}
  * @throws {Error} when invoked to indicate the method should be overridden.
  */
@@ -749,6 +781,10 @@ goog.abstractMethod = function() {
  *     method to.
  */
 goog.addSingletonGetter = function(ctor) {
+  // instance_ is immediately set to prevent issues with sealed constructors
+  // such as are encountered when a constructor is returned as the export object
+  // of a goog.module in unoptimized code.
+  ctor.instance_ = undefined;
   ctor.getInstance = function() {
     if (ctor.instance_) {
       return ctor.instance_;
@@ -870,7 +906,9 @@ if (goog.DEPENDENCIES_ENABLED) {
    * @private
    */
   goog.findBasePath_ = function() {
-    if (goog.isDef(goog.global.CLOSURE_BASE_PATH)) {
+    if (goog.isDef(goog.global.CLOSURE_BASE_PATH) &&
+        // Anti DOM-clobbering runtime check (b/37736576).
+        goog.isString(goog.global.CLOSURE_BASE_PATH)) {
       goog.basePath = goog.global.CLOSURE_BASE_PATH;
       return;
     } else if (!goog.inHtmlDocument_()) {
@@ -878,7 +916,13 @@ if (goog.DEPENDENCIES_ENABLED) {
     }
     /** @type {Document} */
     var doc = goog.global.document;
-    var scripts = doc.getElementsByTagName('SCRIPT');
+    // If we have a currentScript available, use it exclusively.
+    var currentScript = doc.currentScript;
+    if (currentScript) {
+      var scripts = [currentScript];
+    } else {
+      var scripts = doc.getElementsByTagName('SCRIPT');
+    }
     // Search backwards since the current script is in almost all cases the one
     // that has base.js.
     for (var i = scripts.length - 1; i >= 0; --i) {
@@ -920,6 +964,17 @@ if (goog.DEPENDENCIES_ENABLED) {
 
 
   /**
+   * Whether IE9 or earlier is waiting on a dependency.  This ensures that
+   * deferred modules that have no non-deferred dependencies actually get
+   * loaded, since if we defer them and then never pull in a non-deferred
+   * script, then `goog.loadQueuedModules_` will never be called.  Instead,
+   * if not waiting on anything we simply don't defer in the first place.
+   * @private {boolean}
+   */
+  goog.oldIeWaiting_ = false;
+
+
+  /**
    * Given a URL initiate retrieval and execution of a script that needs
    * pre-processing.
    * @param {string} src Script source URL.
@@ -1003,6 +1058,7 @@ if (goog.DEPENDENCIES_ENABLED) {
         goog.maybeProcessDeferredPath_(path);
       }
     }
+    goog.oldIeWaiting_ = false;
   };
 
 
@@ -1028,8 +1084,9 @@ if (goog.DEPENDENCIES_ENABLED) {
   goog.isDeferredModule_ = function(name) {
     var path = goog.getPathFromDeps_(name);
     var loadFlags = path && goog.dependencies_.loadFlags[path] || {};
+    var languageLevel = loadFlags['lang'] || 'es3';
     if (path && (loadFlags['module'] == 'goog' ||
-                 goog.needsTranspile_(loadFlags['lang']))) {
+                 goog.needsTranspile_(languageLevel))) {
       var abspath = goog.basePath + path;
       return (abspath) in goog.dependencies_.deferred;
     }
@@ -1098,68 +1155,6 @@ if (goog.DEPENDENCIES_ENABLED) {
 
 
   /**
-   * @param {function(?):?|string} moduleDef The module definition.
-   */
-  goog.loadModule = function(moduleDef) {
-    // NOTE: we allow function definitions to be either in the from
-    // of a string to eval (which keeps the original source intact) or
-    // in a eval forbidden environment (CSP) we allow a function definition
-    // which in its body must call {@code goog.module}, and return the exports
-    // of the module.
-    var previousState = goog.moduleLoaderState_;
-    try {
-      goog.moduleLoaderState_ = {
-        moduleName: undefined,
-        declareLegacyNamespace: false
-      };
-      var exports;
-      if (goog.isFunction(moduleDef)) {
-        exports = moduleDef.call(goog.global, {});
-      } else if (goog.isString(moduleDef)) {
-        exports = goog.loadModuleFromSource_.call(goog.global, moduleDef);
-      } else {
-        throw Error('Invalid module definition');
-      }
-
-      var moduleName = goog.moduleLoaderState_.moduleName;
-      if (!goog.isString(moduleName) || !moduleName) {
-        throw Error('Invalid module name \"' + moduleName + '\"');
-      }
-
-      // Don't seal legacy namespaces as they may be uses as a parent of
-      // another namespace
-      if (goog.moduleLoaderState_.declareLegacyNamespace) {
-        goog.constructNamespace_(moduleName, exports);
-      } else if (goog.SEAL_MODULE_EXPORTS && Object.seal) {
-        Object.seal(exports);
-      }
-
-      goog.loadedModules_[moduleName] = exports;
-    } finally {
-      goog.moduleLoaderState_ = previousState;
-    }
-  };
-
-
-  /**
-   * @private @const {function(string):?}
-   *
-   * The new type inference warns because this function has no formal
-   * parameters, but its jsdoc says that it takes one argument.
-   * (The argument is used via arguments[0], but NTI does not detect this.)
-   * @suppress {newCheckTypes}
-   */
-  goog.loadModuleFromSource_ = function() {
-    // NOTE: we avoid declaring parameters or local variables here to avoid
-    // masking globals or leaking values into the module definition.
-    'use strict';
-    var exports = {};
-    eval(arguments[0]);
-    return exports;
-  };
-
-
-  /**
    * Writes a new script pointing to {@code src} directly into the DOM.
    *
    * NOTE: This method is not CSP-compliant. @see goog.appendScriptSrcNode_ for
@@ -1246,8 +1241,9 @@ if (goog.DEPENDENCIES_ENABLED) {
             goog.writeScriptSrcNode_(src);
           }
         } else {
-          var state = " onreadystatechange='goog.onScriptLoad_(this, " +
-              ++goog.lastNonModuleScriptIndex_ + ")' ";
+          goog.oldIeWaiting_ = true;
+          var state = ' onreadystatechange=\'goog.onScriptLoad_(this, ' +
+              ++goog.lastNonModuleScriptIndex_ + ')\' ';
           doc.write(
               '<script type="text/javascript" src="' + src + '"' + state +
               '></' +
@@ -1255,7 +1251,8 @@ if (goog.DEPENDENCIES_ENABLED) {
         }
       } else {
         doc.write(
-            '<script type="text/javascript">' + opt_sourceText + '</' +
+            '<script type="text/javascript">' +
+            goog.protectScriptTag_(opt_sourceText) + '</' +
             'script>');
       }
       return true;
@@ -1264,6 +1261,17 @@ if (goog.DEPENDENCIES_ENABLED) {
     }
   };
 
+  /**
+   * Rewrites closing script tags in input to avoid ending an enclosing script
+   * tag.
+   *
+   * @param {string} str
+   * @return {string}
+   * @private
+   */
+  goog.protectScriptTag_ = function(str) {
+    return str.replace(/<\/(SCRIPT)/ig, '\\x3c/$1');
+  };
 
   /**
    * Determines whether the given language needs to be transpiled.
@@ -1276,53 +1284,18 @@ if (goog.DEPENDENCIES_ENABLED) {
       return true;
     } else if (goog.TRANSPILE == 'never') {
       return false;
-    } else if (!goog.transpiledLanguages_) {
-      goog.transpiledLanguages_ = {'es5': true, 'es6': true, 'es6-impl': true};
-      /** @preserveTry */
-      try {
-        // Perform some quick conformance checks, to distinguish
-        // between browsers that support es5, es6-impl, or es6.
-
-        // Identify ES3-only browsers by their incorrect treatment of commas.
-        goog.transpiledLanguages_['es5'] = eval('[1,].length!=1');
-
-        // As browsers mature, features will be moved from the full test
-        // into the impl test.  This must happen before the corresponding
-        // features are changed in the Closure Compiler's FeatureSet object.
-
-        // Test 1: es6-impl [FF49, Edge 13, Chrome 49]
-        //   (a) let/const keyword, (b) class expressions, (c) Map object,
-        //   (d) iterable arguments, (e) spread operator
-        var es6implTest =
-            'let a={};const X=class{constructor(){}x(z){return new Map([' +
-            '...arguments]).get(z[0])==3}};return new X().x([a,3])';
-
-        // Test 2: es6 [FF50 (?), Edge 14 (?), Chrome 50]
-        //   (a) default params (specifically shadowing locals),
-        //   (b) destructuring, (c) block-scoped functions,
-        //   (d) for-of (const), (e) new.target/Reflect.construct
-        var es6fullTest =
-            'class X{constructor(){if(new.target!=String)throw 1;this.x=42}}' +
-            'let q=Reflect.construct(X,[],String);if(q.x!=42||!(q instanceof ' +
-            'String))throw 1;for(const a of[2,3]){if(a==2)continue;function ' +
-            'f(z={a}){let a=0;return z.a}{function f(){return 0;}}return f()' +
-            '==3}';
-
-        if (eval('(()=>{"use strict";' + es6implTest + '})()')) {
-          goog.transpiledLanguages_['es6-impl'] = false;
-        }
-        if (eval('(()=>{"use strict";' + es6fullTest + '})()')) {
-          goog.transpiledLanguages_['es6'] = false;
-        }
-      } catch (err) {
-      }
+    } else if (!goog.requiresTranspilation_) {
+      goog.requiresTranspilation_ = goog.createRequiresTranspilation_();
+    }
+    if (lang in goog.requiresTranspilation_) {
+      return goog.requiresTranspilation_[lang];
+    } else {
+      throw new Error('Unknown language mode: ' + lang);
     }
-    return !!goog.transpiledLanguages_[lang];
   };
 
-
   /** @private {?Object<string, boolean>} */
-  goog.transpiledLanguages_ = null;
+  goog.requiresTranspilation_ = null;
 
 
   /** @private {number} */
@@ -1331,7 +1304,7 @@ if (goog.DEPENDENCIES_ENABLED) {
 
   /**
    * A readystatechange handler for legacy IE
-   * @param {!HTMLScriptElement} script
+   * @param {?} script
    * @param {number} scriptIndex
    * @return {boolean}
    * @private
@@ -1411,7 +1384,8 @@ if (goog.DEPENDENCIES_ENABLED) {
       var path = scripts[i];
       if (path) {
         var loadFlags = deps.loadFlags[path] || {};
-        var needsTranspile = goog.needsTranspile_(loadFlags['lang']);
+        var languageLevel = loadFlags['lang'] || 'es3';
+        var needsTranspile = goog.needsTranspile_(languageLevel);
         if (loadFlags['module'] == 'goog' || needsTranspile) {
           goog.importProcessedScript_(
               goog.basePath + path, loadFlags['module'] == 'goog',
@@ -1455,6 +1429,111 @@ if (goog.DEPENDENCIES_ENABLED) {
 
 
 /**
+ * @package {?boolean}
+ * Visible for testing.
+ */
+goog.hasBadLetScoping = null;
+
+
+/**
+ * @return {boolean}
+ * @package Visible for testing.
+ */
+goog.useSafari10Workaround = function() {
+  if (goog.hasBadLetScoping == null) {
+    var hasBadLetScoping;
+    try {
+      hasBadLetScoping = !eval(
+          '"use strict";' +
+          'let x = 1; function f() { return typeof x; };' +
+          'f() == "number";');
+    } catch (e) {
+      // Assume that ES6 syntax isn't supported.
+      hasBadLetScoping = false;
+    }
+    goog.hasBadLetScoping = hasBadLetScoping;
+  }
+  return goog.hasBadLetScoping;
+};
+
+
+/**
+ * @param {string} moduleDef
+ * @return {string}
+ * @package Visible for testing.
+ */
+goog.workaroundSafari10EvalBug = function(moduleDef) {
+  return '(function(){' + moduleDef +
+      '\n' +  // Terminate any trailing single line comment.
+      ';' +   // Terminate any trailing expression.
+      '})();\n';
+};
+
+
+/**
+ * @param {function(?):?|string} moduleDef The module definition.
+ */
+goog.loadModule = function(moduleDef) {
+  // NOTE: we allow function definitions to be either in the from
+  // of a string to eval (which keeps the original source intact) or
+  // in a eval forbidden environment (CSP) we allow a function definition
+  // which in its body must call {@code goog.module}, and return the exports
+  // of the module.
+  var previousState = goog.moduleLoaderState_;
+  try {
+    goog.moduleLoaderState_ = {
+      moduleName: undefined,
+      declareLegacyNamespace: false
+    };
+    var exports;
+    if (goog.isFunction(moduleDef)) {
+      exports = moduleDef.call(undefined, {});
+    } else if (goog.isString(moduleDef)) {
+      if (goog.useSafari10Workaround()) {
+        moduleDef = goog.workaroundSafari10EvalBug(moduleDef);
+      }
+
+      exports = goog.loadModuleFromSource_.call(undefined, moduleDef);
+    } else {
+      throw Error('Invalid module definition');
+    }
+
+    var moduleName = goog.moduleLoaderState_.moduleName;
+    if (!goog.isString(moduleName) || !moduleName) {
+      throw Error('Invalid module name \"' + moduleName + '\"');
+    }
+
+    // Don't seal legacy namespaces as they may be uses as a parent of
+    // another namespace
+    if (goog.moduleLoaderState_.declareLegacyNamespace) {
+      goog.constructNamespace_(moduleName, exports);
+    } else if (
+        goog.SEAL_MODULE_EXPORTS && Object.seal && typeof exports == 'object' &&
+        exports != null) {
+      Object.seal(exports);
+    }
+
+    goog.loadedModules_[moduleName] = exports;
+  } finally {
+    goog.moduleLoaderState_ = previousState;
+  }
+};
+
+
+/**
+ * @private @const
+ */
+goog.loadModuleFromSource_ = /** @type {function(string):?} */ (function() {
+  // NOTE: we avoid declaring parameters or local variables here to avoid
+  // masking globals or leaking values into the module definition.
+  'use strict';
+  var exports = {};
+  eval(arguments[0]);
+  return exports;
+});
+
+
+/**
  * Normalize a file path by removing redundant ".." and extraneous "." file
  * path components.
  * @param {string} path
@@ -1480,6 +1559,15 @@ goog.normalizePath_ = function(path) {
 
 
 /**
+ * Provides a hook for loading a file when using Closure's goog.require() API
+ * with goog.modules.  In particular this hook is provided to support Node.js.
+ *
+ * @type {(function(string):string)|undefined}
+ */
+goog.global.CLOSURE_LOAD_FILE_SYNC;
+
+
+/**
  * Loads file by synchronous XHR. Should not be used in production environments.
  * @param {string} src Source URL.
  * @return {?string} File contents, or null if load failed.
@@ -1540,7 +1628,7 @@ goog.retrieveAndExec_ = function(src, isModule, needsTranspile) {
       scriptText += '\n//# sourceURL=' + src;
     }
     var isOldIE = goog.IS_OLD_IE_;
-    if (isOldIE) {
+    if (isOldIE && goog.oldIeWaiting_) {
       goog.dependencies_.deferred[originalPath] = scriptText;
       goog.queuedModules_.push(originalPath);
     } else {
@@ -1571,7 +1659,20 @@ goog.transpile_ = function(code, path) {
       // need it, we're about to load and write the ES6 code synchronously,
       // so a normal script-tag load will be too slow.
       eval(transpilerCode + '\n//# sourceURL=' + transpilerPath);
-      // Note: transpile.js reassigns goog.global['$jscomp'] so pull it again.
+      // Even though the transpiler is optional, if $gwtExport is found, it's
+      // a sign the transpiler was loaded and the $jscomp.transpile *should*
+      // be there.
+      if (goog.global['$gwtExport'] && goog.global['$gwtExport']['$jscomp'] &&
+          !goog.global['$gwtExport']['$jscomp']['transpile']) {
+        throw new Error(
+            'The transpiler did not properly export the "transpile" ' +
+            'method. $gwtExport: ' + JSON.stringify(goog.global['$gwtExport']));
+      }
+      // transpile.js only exports a single $jscomp function, transpile. We
+      // grab just that and add it to the existing definition of $jscomp which
+      // contains the polyfills.
+      goog.global['$jscomp'].transpile =
+          goog.global['$gwtExport']['$jscomp']['transpile'];
       jscomp = goog.global['$jscomp'];
       transpile = jscomp.transpile;
     }
@@ -1756,36 +1857,6 @@ goog.isDateLike = function(val) {
 
 
 /**
- * Returns true if the specified value is a string.
- * @param {?} val Variable to test.
- * @return {boolean} Whether variable is a string.
- */
-goog.isString = function(val) {
-  return typeof val == 'string';
-};
-
-
-/**
- * Returns true if the specified value is a boolean.
- * @param {?} val Variable to test.
- * @return {boolean} Whether variable is boolean.
- */
-goog.isBoolean = function(val) {
-  return typeof val == 'boolean';
-};
-
-
-/**
- * Returns true if the specified value is a number.
- * @param {?} val Variable to test.
- * @return {boolean} Whether variable is a number.
- */
-goog.isNumber = function(val) {
-  return typeof val == 'number';
-};
-
-
-/**
  * Returns true if the specified value is a function.
  * @param {?} val Variable to test.
  * @return {boolean} Whether variable is a function.
@@ -1858,7 +1929,7 @@ goog.removeUid = function(obj) {
   if (obj !== null && 'removeAttribute' in obj) {
     obj.removeAttribute(goog.UID_PROPERTY_);
   }
-  /** @preserveTry */
+
   try {
     delete obj[goog.UID_PROPERTY_];
   } catch (ex) {
@@ -1935,17 +2006,15 @@ goog.cloneObject = function(obj) {
 
 /**
  * A native implementation of goog.bind.
- * @param {Function} fn A function to partially apply.
- * @param {Object|undefined} selfObj Specifies the object which this should
- *     point to when the function is run.
+ * @param {?function(this:T, ...)} fn A function to partially apply.
+ * @param {T} selfObj Specifies the object which this should point to when the
+ *     function is run.
  * @param {...*} var_args Additional arguments that are partially applied to the
  *     function.
- * @return {!Function} A partially-applied form of the function bind() was
+ * @return {!Function} A partially-applied form of the function goog.bind() was
  *     invoked as a method of.
+ * @template T
  * @private
- * @suppress {deprecated} The compiler thinks that Function.prototype.bind is
- *     deprecated because some people have declared a pure-JS version.
- *     Only the pure-JS version is truly deprecated.
  */
 goog.bindNative_ = function(fn, selfObj, var_args) {
   return /** @type {!Function} */ (fn.call.apply(fn.bind, arguments));
@@ -1954,13 +2023,14 @@ goog.bindNative_ = function(fn, selfObj, var_args) {
 
 /**
  * A pure-JS implementation of goog.bind.
- * @param {Function} fn A function to partially apply.
- * @param {Object|undefined} selfObj Specifies the object which this should
- *     point to when the function is run.
+ * @param {?function(this:T, ...)} fn A function to partially apply.
+ * @param {T} selfObj Specifies the object which this should point to when the
+ *     function is run.
  * @param {...*} var_args Additional arguments that are partially applied to the
  *     function.
- * @return {!Function} A partially-applied form of the function bind() was
+ * @return {!Function} A partially-applied form of the function goog.bind() was
  *     invoked as a method of.
+ * @template T
  * @private
  */
 goog.bindJs_ = function(fn, selfObj, var_args) {
@@ -1978,7 +2048,9 @@ goog.bindJs_ = function(fn, selfObj, var_args) {
     };
 
   } else {
-    return function() { return fn.apply(selfObj, arguments); };
+    return function() {
+      return fn.apply(selfObj, arguments);
+    };
   }
 };
 
@@ -2158,6 +2230,17 @@ goog.cssNameMapping_;
 goog.cssNameMappingStyle_;
 
 
+
+/**
+ * A hook for modifying the default behavior goog.getCssName. The function
+ * if present, will recieve the standard output of the goog.getCssName as
+ * its input.
+ *
+ * @type {(function(string):string)|undefined}
+ */
+goog.global.CLOSURE_CSS_NAME_MAP_FN;
+
+
 /**
  * Handles strings that are intended to be used as CSS class names.
  *
@@ -2190,6 +2273,14 @@ goog.cssNameMappingStyle_;
  *     the modifier.
  */
 goog.getCssName = function(className, opt_modifier) {
+  // String() is used for compatibility with compiled soy where the passed
+  // className can be non-string objects.
+  if (String(className).charAt(0) == '.') {
+    throw new Error(
+        'className passed in goog.getCssName must not start with ".".' +
+        ' You passed: ' + className);
+  }
+
   var getMapping = function(cssName) {
     return goog.cssNameMapping_[cssName] || cssName;
   };
@@ -2209,14 +2300,21 @@ goog.getCssName = function(className, opt_modifier) {
     rename =
         goog.cssNameMappingStyle_ == 'BY_WHOLE' ? getMapping : renameByParts;
   } else {
-    rename = function(a) { return a; };
+    rename = function(a) {
+      return a;
+    };
   }
 
-  if (opt_modifier) {
-    return className + '-' + rename(opt_modifier);
-  } else {
-    return rename(className);
+  var result =
+      opt_modifier ? className + '-' + rename(opt_modifier) : rename(className);
+
+  // The special CLOSURE_CSS_NAME_MAP_FN allows users to specify further
+  // processing of the class name.
+  if (goog.global.CLOSURE_CSS_NAME_MAP_FN) {
+    return goog.global.CLOSURE_CSS_NAME_MAP_FN(result);
   }
+
+  return result;
 };
 
 
@@ -2443,6 +2541,9 @@ goog.inherits = function(childCtor, parentCtor) {
  * @return {*} The return value of the superclass method.
  * @suppress {es5Strict} This method can not be used in strict mode, but
  *     all Closure Library consumers must depend on this file.
+ * @deprecated goog.base is not strict mode compatible.  Prefer the static
+ *     "base" method added to the constructor by goog.inherits
+ *     or ES6 classes and the "super" keyword.
  */
 goog.base = function(me, opt_methodName, var_args) {
   var caller = arguments.callee.caller;
@@ -2593,7 +2694,6 @@ goog.defineClass = function(superClass, def) {
  *   constructor: (!Function|undefined),
  *   statics: (Object|undefined|function(Function):void)
  * }}
- * @suppress {missingProvide}
  */
 goog.defineClass.ClassDescriptor;
 
@@ -2652,7 +2752,7 @@ goog.defineClass.createSealingConstructor_ = function(ctr, superClass) {
 
 /**
  * @param {Function} ctr The constructor to test.
- * @returns {boolean} Whether the constructor has been tagged as unsealable
+ * @return {boolean} Whether the constructor has been tagged as unsealable
  *     using goog.tagUnsealableClass.
  * @private
  */
@@ -2725,3 +2825,97 @@ goog.tagUnsealableClass = function(ctr) {
  * @const @private {string}
  */
 goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_ = 'goog_defineClass_legacy_unsealable';
+
+
+/**
+ * Returns a newly created map from language mode string to a boolean
+ * indicating whether transpilation should be done for that mode.
+ *
+ * Guaranteed invariant:
+ * For any two modes, l1 and l2 where l2 is a newer mode than l1,
+ * `map[l1] == true` implies that `map[l2] == true`.
+ * @private
+ * @return {!Object<string, boolean>}
+ */
+goog.createRequiresTranspilation_ = function() {
+  var /** !Object<string, boolean> */ requiresTranspilation = {'es3': false};
+  var transpilationRequiredForAllLaterModes = false;
+
+  /**
+   * Adds an entry to requiresTranspliation for the given language mode.
+   *
+   * IMPORTANT: Calls must be made in order from oldest to newest language
+   * mode.
+   * @param {string} modeName
+   * @param {function(): boolean} isSupported Returns true if the JS engine
+   *     supports the given mode.
+   */
+  function addNewerLanguageTranspilationCheck(modeName, isSupported) {
+    if (transpilationRequiredForAllLaterModes) {
+      requiresTranspilation[modeName] = true;
+    } else if (isSupported()) {
+      requiresTranspilation[modeName] = false;
+    } else {
+      requiresTranspilation[modeName] = true;
+      transpilationRequiredForAllLaterModes = true;
+    }
+  }
+
+  /**
+   * Does the given code evaluate without syntax errors and return a truthy
+   * result?
+   */
+  function /** boolean */ evalCheck(/** string */ code) {
+    try {
+      return !!eval(code);
+    } catch (ignored) {
+      return false;
+    }
+  }
+
+  var userAgent = goog.global.navigator && goog.global.navigator.userAgent ?
+      goog.global.navigator.userAgent :
+      '';
+
+  // Identify ES3-only browsers by their incorrect treatment of commas.
+  addNewerLanguageTranspilationCheck('es5', function() {
+    return evalCheck('[1,].length==1');
+  });
+  addNewerLanguageTranspilationCheck('es6', function() {
+    // Edge has a non-deterministic (i.e., not reproducible) bug with ES6:
+    // https://github.com/Microsoft/ChakraCore/issues/1496.
+    var re = /Edge\/(\d+)(\.\d)*/i;
+    var edgeUserAgent = userAgent.match(re);
+    if (edgeUserAgent && Number(edgeUserAgent[1]) < 15) {
+      return false;
+    }
+    // Test es6: [FF50 (?), Edge 14 (?), Chrome 50]
+    //   (a) default params (specifically shadowing locals),
+    //   (b) destructuring, (c) block-scoped functions,
+    //   (d) for-of (const), (e) new.target/Reflect.construct
+    var es6fullTest =
+        'class X{constructor(){if(new.target!=String)throw 1;this.x=42}}' +
+        'let q=Reflect.construct(X,[],String);if(q.x!=42||!(q instanceof ' +
+        'String))throw 1;for(const a of[2,3]){if(a==2)continue;function ' +
+        'f(z={a}){let a=0;return z.a}{function f(){return 0;}}return f()' +
+        '==3}';
+
+    return evalCheck('(()=>{"use strict";' + es6fullTest + '})()');
+  });
+  // TODO(joeltine): Remove es6-impl references for b/31340605.
+  // Consider es6-impl (widely-implemented es6 features) to be supported
+  // whenever es6 is supported. Technically es6-impl is a lower level of
+  // support than es6, but we don't have tests specifically for it.
+  addNewerLanguageTranspilationCheck('es6-impl', function() {
+    return true;
+  });
+  // ** and **= are the only new features in 'es7'
+  addNewerLanguageTranspilationCheck('es7', function() {
+    return evalCheck('2 ** 2 == 4');
+  });
+  // async functions are the only new features in 'es8'
+  addNewerLanguageTranspilationCheck('es8', function() {
+    return evalCheck('async () => 1, true');
+  });
+  return requiresTranspilation;
+};