Adding ChromeVox as a component extensions (enabled only for ChromeOS, for no...

chrome/browser/resources/access_chromevox/closure/base.js

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @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.
+ */
+
+/**
+ * @define {boolean} Overridden to true by the compiler when --closure_pass
+ *     or --mark_as_compiled is specified.
+ */
+var COMPILED = false;
+
+
+/**
+ * Base namespace for the Closure library.  Checks to see goog is
+ * already defined in the current scope before assigning to prevent
+ * clobbering if base.js is loaded more than once.
+ *
+ * @const
+ */
+var goog = goog || {};
+
+
+/**
+ * Reference to the global context.  In most cases this will be 'window'.
+ */
+goog.global = this;
+
+
+/**
+ * @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.
+ */
+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
+ * option.
+ *
+ * Take into account that the locale code format is important. You should use
+ * the canonical Unicode format with hyphen as a delimiter. Language must be
+ * lowercase, Language Script - Capitalized, Region - UPPERCASE.
+ * There are few examples: pt-BR, en, en-US, sr-Latin-BO, zh-Hans-CN.
+ *
+ * See more info about locale codes here:
+ * http://www.unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers
+ *
+ * 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.
+ */
+goog.LOCALE = 'en';  // default to en
+
+
+/**
+ * Indicates whether or not we can call 'eval' directly to eval code in the
+ * global scope. Set to a Boolean by the first call to goog.globalEval (which
+ * empirically tests whether eval works for globals). @see goog.globalEval
+ * @type {?boolean}
+ * @private
+ */
+goog.evalWorksForGlobals_ = null;
+
+
+/**
+ * Creates object stubs for a namespace. When present in a file, goog.provide
+ * also indicates that the file defines the indicated object. Calls to
+ * goog.provide are resolved by the compiler if --closure_pass is set.
+ * @param {string} name name of the object that this file defines.
+ */
+goog.provide = function(name) {
+  if (!COMPILED) {
+    // Ensure that the same namespace isn't provided twice. This is intended
+    // to teach new developers that 'goog.provide' is effectively a variable
+    // declaration. And when JSCompiler transforms goog.provide into a real
+    // variable declaration, the compiled JS should work the same as the raw
+    // JS--even when the raw JS uses goog.provide incorrectly.
+    if (goog.getObjectByName(name) && !goog.implicitNamespaces_[name]) {
+      throw Error('Namespace "' + name + '" already declared.');
+    }
+
+    var namespace = name;
+    while ((namespace = namespace.substring(0, namespace.lastIndexOf('.')))) {
+      goog.implicitNamespaces_[namespace] = true;
+    }
+  }
+
+  goog.exportPath_(name);
+};
+
+
+/**
+ * Marks that the current file should only be used for testing, and never for
+ * live code in production.
+ * @param {string=} opt_message Optional message to add to the error that's
+ *     raised when used in production code.
+ */
+goog.setTestOnly = function(opt_message) {
+  if (COMPILED && !goog.DEBUG) {
+    opt_message = opt_message || '';
+    throw Error('Importing test-only code into non-debug environment' +
+                opt_message ? ': ' + opt_message : '.');
+  }
+};
+
+
+if (!COMPILED) {
+  /**
+   * Namespaces implicitly defined by goog.provide. For example,
+   * goog.provide('goog.events.Event') implicitly declares
+   * that 'goog' and 'goog.events' must be namespaces.
+   *
+   * @type {Object}
+   * @private
+   */
+  goog.implicitNamespaces_ = {};
+}
+
+
+/**
+ * Builds an object structure for the provided namespace path,
+ * ensuring that names that already exist are not overwritten. For
+ * example:
+ * "a.b.c" -> a = {};a.b={};a.b.c={};
+ * Used by goog.provide and goog.exportSymbol.
+ * @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|.
+ * @private
+ */
+goog.exportPath_ = function(name, opt_object, opt_objectToExportTo) {
+  var parts = name.split('.');
+  var cur = opt_objectToExportTo || goog.global;
+
+  // Internet Explorer exhibits strange behavior when throwing errors from
+  // methods externed in this manner.  See the testExportSymbolExceptions in
+  // base_test.html for an example.
+  if (!(parts[0] in cur) && cur.execScript) {
+    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]) {
+      cur = cur[part];
+    } else {
+      cur = cur[part] = {};
+    }
+  }
+};
+
+
+/**
+ * Returns an object based on its fully qualified external name.  If you are
+ * using a compilation pass that renames property names beware that using this
+ * function will not find renamed properties.
+ *
+ * @param {string} name The fully qualified name.
+ * @param {Object=} opt_obj The object within which to look; default is
+ *     |goog.global|.
+ * @return {Object} The object or, if not found, null.
+ */
+goog.getObjectByName = function(name, opt_obj) {
+  var parts = name.split('.');
+  var cur = opt_obj || goog.global;
+  for (var part; part = parts.shift(); ) {
+    if (cur[part]) {
+      cur = cur[part];
+    } else {
+      return null;
+    }
+  }
+  return cur;
+};
+
+
+/**
+ * Globalizes a whole namespace, such as goog or goog.lang.
+ *
+ * @param {Object} obj The namespace to globalize.
+ * @param {Object=} opt_global The object to add the properties to.
+ * @deprecated Properties may be explicitly exported to the global scope, but
+ *     this should no longer be done in bulk.
+ */
+goog.globalize = function(obj, opt_global) {
+  var global = opt_global || goog.global;
+  for (var x in obj) {
+    global[x] = obj[x];
+  }
+};
+
+
+/**
+ * Adds a dependency from a file to the files it requires.
+ * @param {string} relPath The path to the js file.
+ * @param {Array} provides An array of strings with the names of the objects
+ *                         this file provides.
+ * @param {Array} requires An array of strings with the names of the objects
+ *                         this file requires.
+ */
+goog.addDependency = function(relPath, provides, requires) {
+  if (!COMPILED) {
+    var provide, require;
+    var path = relPath.replace(/\\/g, '/');
+    var deps = goog.dependencies_;
+    for (var i = 0; provide = provides[i]; i++) {
+      deps.nameToPath[provide] = path;
+      if (!(path in deps.pathToNames)) {
+        deps.pathToNames[path] = {};
+      }
+      deps.pathToNames[path][provide] = true;
+    }
+    for (var j = 0; require = requires[j]; j++) {
+      if (!(path in deps.requires)) {
+        deps.requires[path] = {};
+      }
+      deps.requires[path][require] = true;
+    }
+  }
+};
+
+
+// MOE:begin_strip
+/**
+ * Whether goog.require should throw an exception if it fails.
+ * @type {boolean}
+ */
+goog.useStrictRequires = false;
+
+
+// MOE:end_strip
+/**
+ * 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
+ * --closure_pass option is used.
+ * @param {string} rule Rule to include, in the form goog.package.part.
+ */
+goog.require = function(rule) {
+
+  // if the object already exists we do not need do do anything
+  // TODO(arv): If we start to support require based on file name this has
+  //            to change
+  // TODO(arv): If we allow goog.foo.* this has to change
+  // TODO(arv): If we implement dynamic load after page load we should probably
+  //            not remove this code for the compiled output
+  if (!COMPILED) {
+    if (goog.getObjectByName(rule)) {
+      return;
+    }
+    var path = goog.getPathFromDeps_(rule);
+    if (path) {
+      goog.included_[path] = true;
+      goog.writeScripts_();
+    } else {
+      var errorMessage = 'goog.require could not find: ' + rule;
+      if (goog.global.console) {
+        goog.global.console['error'](errorMessage);
+      }
+
+      // MOE:begin_strip
+
+      // NOTE(nicksantos): We could always throw an error, but this would break
+      // legacy users that depended on this failing silently. Instead, the
+      // compiler should warn us when there are invalid goog.require calls.
+      // For now, we simply give clients a way to turn strict mode on.
+      if (goog.useStrictRequires) {
+        // MOE:end_strip
+        throw Error(errorMessage);
+        // MOE:begin_strip
+      }
+      // MOE:end_strip
+    }
+  }
+};
+
+
+/**
+ * Path for included scripts
+ * @type {string}
+ */
+goog.basePath = '';
+
+
+/**
+ * A hook for overriding the base path.
+ * @type {string|undefined}
+ */
+goog.global.CLOSURE_BASE_PATH;
+
+
+/**
+ * Whether to write out Closure's deps file. By default,
+ * the deps are written.
+ * @type {boolean|undefined}
+ */
+goog.global.CLOSURE_NO_DEPS;
+
+
+/**
+ * Null function used for default values of callbacks, etc.
+ * @return {void} Nothing.
+ */
+goog.nullFunction = function() {};
+
+
+/**
+ * The identity function. Returns its first argument.
+ *
+ * @param {...*} var_args The arguments of the function.
+ * @return {*} The first argument.
+ * @deprecated Use goog.functions.identity instead.
+ */
+goog.identityFunction = function(var_args) {
+  return arguments[0];
+};
+
+
+/**
+ * When defining a class Foo with an abstract method bar(), you can do:
+ *
+ * Foo.prototype.bar = goog.abstractMethod
+ *
+ * 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.
+ */
+goog.abstractMethod = function() {
+  throw Error('unimplemented abstract method');
+};
+
+
+/**
+ * Adds a {@code getInstance} static method that always return the same instance
+ * object.
+ * @param {!Function} ctor The constructor for the class to add the static
+ *     method to.
+ */
+goog.addSingletonGetter = function(ctor) {
+  ctor.getInstance = function() {
+    return ctor.instance_ || (ctor.instance_ = new ctor());
+  };
+};
+
+
+if (!COMPILED) {
+  /**
+   * Object used to keep track of urls that have already been added. This
+   * record allows the prevention of circular dependencies.
+   * @type {Object}
+   * @private
+   */
+  goog.included_ = {};
+
+
+  /**
+   * Array of urls that should be included next, in order.
+   * @type {Array}
+   * @private
+   */
+  goog.queue_ = [];
+
+
+  /**
+   * This object is used to keep track of dependencies and other data that is
+   * used for loading scripts
+   * @private
+   * @type {Object}
+   */
+  goog.dependencies_ = {
+    pathToNames: {}, // 1 to many
+    nameToPath: {}, // 1 to 1
+    requires: {}, // 1 to many
+    // used when resolving dependencies to prevent us from
+    // visiting the file twice
+    visited: {},
+    written: {} // used to keep track of script files we have written
+  };
+
+
+  /**
+   * Tries to detect whether is in the context of an HTML document.
+   * @return {boolean} True if it looks like HTML document.
+   * @private
+   */
+  goog.inHtmlDocument_ = function() {
+    var doc = goog.global.document;
+    return typeof doc != 'undefined' &&
+           'write' in doc;  // XULDocument misses write.
+  };
+
+
+  /**
+   * Tries to detect the base path of the base.js script that bootstraps Closure
+   * @private
+   */
+  goog.findBasePath_ = function() {
+    if (!goog.inHtmlDocument_()) {
+      return;
+    }
+    var doc = goog.global.document;
+    if (goog.global.CLOSURE_BASE_PATH) {
+      goog.basePath = goog.global.CLOSURE_BASE_PATH;
+      return;
+    }
+    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) {
+      var src = scripts[i].src;
+      var l = src.length;
+      if (src.substr(l - 7) == 'base.js') {
+        goog.basePath = src.substr(0, l - 7);
+        return;
+      }
+    }
+  };
+
+
+  /**
+   * Writes a script tag if, and only if, that script hasn't already been added
+   * to the document.  (Must be called at execution time)
+   * @param {string} src Script source.
+   * @private
+   */
+  goog.writeScriptTag_ = function(src) {
+    if (!goog.inHtmlDocument_() ||
+        goog.dependencies_.written[src]) {
+      return;
+    }
+
+    goog.dependencies_.written[src] = true;
+
+    if (goog.global.CHROME_CONTENT_SCRIPT) {
+      function loadNextScript() {
+        if (goog.queue_.length == 0)
+          return;
+        var doc = goog.global.document;
+        var scriptElt = document.createElement('script');
+        scriptElt.type = 'text/javascript';
+        scriptElt.src = goog.queue_[0] + '?' + new Date().getTime();
+        doc.getElementsByTagName('head')[0].appendChild(scriptElt);
+        scriptElt.onload = function() {
+          goog.queue_ = goog.queue_.slice(1);
+          loadNextScript();
+        };
+      }
+
+      goog.queue_.push(src);
+      if (goog.queue_.length == 1) {
+        loadNextScript();
+      }
+    } else {
+      var doc = goog.global.document;
+      doc.write('<script type="text/javascript" src="' +
+                src + '"></' + 'script>');
+    }
+  };
+
+
+  /**
+   * Resolves dependencies based on the dependencies added using addDependency
+   * and calls writeScriptTag_ in the correct order.
+   * @private
+   */
+  goog.writeScripts_ = function() {
+    // the scripts we need to write this time
+    var scripts = [];
+    var seenScript = {};
+    var deps = goog.dependencies_;
+
+    function visitNode(path) {
+      if (path in deps.written) {
+        return;
+      }
+
+      // we have already visited this one. We can get here if we have cyclic
+      // dependencies
+      if (path in deps.visited) {
+        if (!(path in seenScript)) {
+          seenScript[path] = true;
+          scripts.push(path);
+        }
+        return;
+      }
+
+      deps.visited[path] = true;
+
+      if (path in deps.requires) {
+        for (var requireName in deps.requires[path]) {
+          if (requireName in deps.nameToPath) {
+            visitNode(deps.nameToPath[requireName]);
+          } else if (!goog.getObjectByName(requireName)) {
+            // If the required name is defined, we assume that this
+            // dependency was bootstapped by other means. Otherwise,
+            // throw an exception.
+            throw Error('Undefined nameToPath for ' + requireName);
+          }
+        }
+      }
+
+      if (!(path in seenScript)) {
+        seenScript[path] = true;
+        scripts.push(path);
+      }
+    }
+
+    for (var path in goog.included_) {
+      if (!deps.written[path]) {
+        visitNode(path);
+      }
+    }
+
+    for (var i = 0; i < scripts.length; i++) {
+      if (scripts[i]) {
+        goog.writeScriptTag_(goog.basePath + scripts[i]);
+      } else {
+        throw Error('Undefined script input');
+      }
+    }
+  };
+
+
+  /**
+   * Looks at the dependency rules and tries to determine the script file that
+   * fulfills a particular rule.
+   * @param {string} rule In the form goog.namespace.Class or project.script.
+   * @return {?string} Url corresponding to the rule, or null.
+   * @private
+   */
+  goog.getPathFromDeps_ = function(rule) {
+    if (rule in goog.dependencies_.nameToPath) {
+      return goog.dependencies_.nameToPath[rule];
+    } else {
+      return null;
+    }
+  };
+
+  goog.findBasePath_();
+
+  // Allow projects to manage the deps files themselves.
+  if (!goog.global.CLOSURE_NO_DEPS) {
+    goog.writeScriptTag_(goog.basePath + 'deps.js');
+  }
+}
+
+
+
+//==============================================================================
+// Language Enhancements
+//==============================================================================
+
+
+/**
+ * This is a "fixed" version of the typeof operator.  It differs from the typeof
+ * operator in such a way that null returns 'null' and arrays return 'array'.
+ * @param {*} value The value to get the type of.
+ * @return {string} The name of the type.
+ */
+goog.typeOf = function(value) {
+  var s = typeof value;
+  if (s == 'object') {
+    if (value) {
+      // We cannot use constructor == Array or instanceof Array because
+      // different frames have different Array objects. In IE6, if the iframe
+      // where the array was created is destroyed, the array loses its
+      // prototype. Then dereferencing val.splice here throws an exception, so
+      // we can't use goog.isFunction. Calling typeof directly returns 'unknown'
+      // so that will work. In this case, this function will return false and
+      // most array functions will still work because the array is still
+      // array-like (supports length and []) even though it has lost its
+      // prototype.
+      // Mark Miller noticed that Object.prototype.toString
+      // allows access to the unforgeable [[Class]] property.
+      //  15.2.4.2 Object.prototype.toString ( )
+      //  When the toString method is called, the following steps are taken:
+      //      1. Get the [[Class]] property of this object.
+      //      2. Compute a string value by concatenating the three strings
+      //         "[object ", Result(1), and "]".
+      //      3. Return Result(2).
+      // and this behavior survives the destruction of the execution context.
+      if (value instanceof Array ||  // Works quickly in same execution context.
+          // If value is from a different execution context then
+          // !(value instanceof Object), which lets us early out in the common
+          // case when value is from the same context but not an array.
+          // The {if (value)} check above means we don't have to worry about
+          // undefined behavior of Object.prototype.toString on null/undefined.
+          //
+          // HACK: In order to use an Object prototype method on the arbitrary
+          //   value, the compiler requires the value be cast to type Object,
+          //   even though the ECMA spec explicitly allows it.
+          (!(value instanceof Object) &&
+           (Object.prototype.toString.call(
+               /** @type {Object} */ (value)) == '[object Array]') ||
+
+           // In IE all non value types are wrapped as objects across window
+           // boundaries (not iframe though) so we have to do object detection
+           // for this edge case
+           typeof value.length == 'number' &&
+           typeof value.splice != 'undefined' &&
+           typeof value.propertyIsEnumerable != 'undefined' &&
+           !value.propertyIsEnumerable('splice')
+
+          )) {
+        return 'array';
+      }
+      // HACK: There is still an array case that fails.
+      //     function ArrayImpostor() {}
+      //     ArrayImpostor.prototype = [];
+      //     var impostor = new ArrayImpostor;
+      // this can be fixed by getting rid of the fast path
+      // (value instanceof Array) and solely relying on
+      // (value && Object.prototype.toString.vall(value) === '[object Array]')
+      // but that would require many more function calls and is not warranted
+      // unless closure code is receiving objects from untrusted sources.
+
+      // IE in cross-window calls does not correctly marshal the function type
+      // (it appears just as an object) so we cannot use just typeof val ==
+      // 'function'. However, if the object has a call property, it is a
+      // function.
+      if (!(value instanceof Object) &&
+          (Object.prototype.toString.call(
+              /** @type {Object} */ (value)) == '[object Function]' ||
+          typeof value.call != 'undefined' &&
+          typeof value.propertyIsEnumerable != 'undefined' &&
+          !value.propertyIsEnumerable('call'))) {
+        return 'function';
+      }
+
+
+    } else {
+      return 'null';
+    }
+
+  } else if (s == 'function' && typeof value.call == 'undefined') {
+    // In Safari typeof nodeList returns 'function', and on Firefox
+    // typeof behaves similarly for HTML{Applet,Embed,Object}Elements
+    // and RegExps.  We would like to return object for those and we can
+    // detect an invalid function by making sure that the function
+    // object has a call method.
+    return 'object';
+  }
+  return s;
+};
+
+
+/**
+ * Safe way to test whether a property is enumarable.  It allows testing
+ * for enumerable on objects where 'propertyIsEnumerable' is overridden or
+ * does not exist (like DOM nodes in IE). Does not use browser native
+ * Object.propertyIsEnumerable.
+ * @param {Object} object The object to test if the property is enumerable.
+ * @param {string} propName The property name to check for.
+ * @return {boolean} True if the property is enumarable.
+ * @private
+ */
+goog.propertyIsEnumerableCustom_ = function(object, propName) {
+  // KJS in Safari 2 is not ECMAScript compatible and lacks crucial methods
+  // such as propertyIsEnumerable.  We therefore use a workaround.
+  // Does anyone know a more efficient work around?
+  if (propName in object) {
+    for (var key in object) {
+      if (key == propName &&
+          Object.prototype.hasOwnProperty.call(object, propName)) {
+        return true;
+      }
+    }
+  }
+  return false;
+};
+
+
+/**
+ * Safe way to test whether a property is enumarable.  It allows testing
+ * for enumerable on objects where 'propertyIsEnumerable' is overridden or
+ * does not exist (like DOM nodes in IE).
+ * @param {Object} object The object to test if the property is enumerable.
+ * @param {string} propName The property name to check for.
+ * @return {boolean} True if the property is enumarable.
+ * @private
+ */
+goog.propertyIsEnumerable_ = function(object, propName) {
+  // In IE if object is from another window, cannot use propertyIsEnumerable
+  // from this window's Object. Will raise a 'JScript object expected' error.
+  if (object instanceof Object) {
+    return Object.prototype.propertyIsEnumerable.call(object, propName);
+  } else {
+    return goog.propertyIsEnumerableCustom_(object, propName);
+  }
+};
+
+
+/**
+ * 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.  Additionally, this function assumes that the global
+ * undefined variable has not been redefined.
+ * @param {*} val Variable to test.
+ * @return {boolean} Whether variable is defined.
+ */
+goog.isDef = function(val) {
+  return val !== undefined;
+};
+
+
+/**
+ * Returns true if the specified value is |null|
+ * @param {*} val Variable to test.
+ * @return {boolean} Whether variable is null.
+ */
+goog.isNull = function(val) {
+  return val === null;
+};
+
+
+/**
+ * Returns true if the specified value is defined and not null
+ * @param {*} val Variable to test.
+ * @return {boolean} Whether variable is defined and not null.
+ */
+goog.isDefAndNotNull = function(val) {
+  // Note that undefined == null.
+  return val != null;
+};
+
+
+/**
+ * Returns true if the specified value is an array
+ * @param {*} val Variable to test.
+ * @return {boolean} Whether variable is an array.
+ */
+goog.isArray = function(val) {
+  return goog.typeOf(val) == 'array';
+};
+
+
+/**
+ * Returns true if the object looks like an array. To qualify as array like
+ * the value needs to be either a NodeList or an object with a Number length
+ * property.
+ * @param {*} val Variable to test.
+ * @return {boolean} Whether variable is an array.
+ */
+goog.isArrayLike = function(val) {
+  var type = goog.typeOf(val);
+  return type == 'array' || type == 'object' && typeof val.length == 'number';
+};
+
+
+/**
+ * Returns true if the object looks like a Date. To qualify as Date-like
+ * the value needs to be an object and have a getFullYear() function.
+ * @param {*} val Variable to test.
+ * @return {boolean} Whether variable is a like a Date.
+ */
+goog.isDateLike = function(val) {
+  return goog.isObject(val) && typeof val.getFullYear == 'function';
+};
+
+
+/**
+ * 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.
+ */
+goog.isFunction = function(val) {
+  return goog.typeOf(val) == 'function';
+};
+
+
+/**
+ * Returns true if the specified value is an object.  This includes arrays
+ * and functions.
+ * @param {*} val Variable to test.
+ * @return {boolean} Whether variable is an object.
+ */
+goog.isObject = function(val) {
+  var type = goog.typeOf(val);
+  return type == 'object' || type == 'array' || type == 'function';
+};
+
+
+/**
+ * Gets a unique ID for an object. This mutates the object so that further
+ * calls with the same object as a parameter returns the same value. The unique
+ * ID is guaranteed to be unique across the current session amongst objects that
+ * are passed into {@code getUid}. There is no guarantee that the ID is unique
+ * or consistent across sessions. It is unsafe to generate unique ID for
+ * function prototypes.
+ *
+ * @param {Object} obj The object to get the unique ID for.
+ * @return {number} The unique ID for the object.
+ */
+goog.getUid = function(obj) {
+  // TODO(arv): Make the type stricter, do not accept null.
+
+  // In Opera window.hasOwnProperty exists but always returns false so we avoid
+  // using it. As a consequence the unique ID generated for BaseClass.prototype
+  // and SubClass.prototype will be the same.
+  return obj[goog.UID_PROPERTY_] ||
+      (obj[goog.UID_PROPERTY_] = ++goog.uidCounter_);
+};
+
+
+/**
+ * Removes the unique ID from an object. This is useful if the object was
+ * previously mutated using {@code goog.getUid} in which case the mutation is
+ * undone.
+ * @param {Object} obj The object to remove the unique ID field from.
+ */
+goog.removeUid = function(obj) {
+  // TODO(arv): Make the type stricter, do not accept null.
+
+  // DOM nodes in IE are not instance of Object and throws exception
+  // for delete. Instead we try to use removeAttribute
+  if ('removeAttribute' in obj) {
+    obj.removeAttribute(goog.UID_PROPERTY_);
+  }
+  /** @preserveTry */
+  try {
+    delete obj[goog.UID_PROPERTY_];
+  } catch (ex) {
+  }
+};
+
+
+/**
+ * Name for unique ID property. Initialized in a way to help avoid collisions
+ * with other closure javascript on the same page.
+ * @type {string}
+ * @private
+ */
+goog.UID_PROPERTY_ = 'closure_uid_' +
+    Math.floor(Math.random() * 2147483648).toString(36);
+
+
+/**
+ * Counter for UID.
+ * @type {number}
+ * @private
+ */
+goog.uidCounter_ = 0;
+
+
+/**
+ * Adds a hash code field to an object. The hash code is unique for the
+ * given object.
+ * @param {Object} obj The object to get the hash code for.
+ * @return {number} The hash code for the object.
+ * @deprecated Use goog.getUid instead.
+ */
+goog.getHashCode = goog.getUid;
+
+
+/**
+ * Removes the hash code field from an object.
+ * @param {Object} obj The object to remove the field from.
+ * @deprecated Use goog.removeUid instead.
+ */
+goog.removeHashCode = goog.removeUid;
+
+
+/**
+ * Clones a value. The input may be an Object, Array, or basic type. Objects and
+ * arrays will be cloned recursively.
+ *
+ * WARNINGS:
+ * <code>goog.cloneObject</code> does not detect reference loops. Objects that
+ * refer to themselves will cause infinite recursion.
+ *
+ * <code>goog.cloneObject</code> is unaware of unique identifiers, and copies
+ * UIDs created by <code>getUid</code> into cloned results.
+ *
+ * @param {*} obj The value to clone.
+ * @return {*} A clone of the input value.
+ * @deprecated goog.cloneObject is unsafe. Prefer the goog.object methods.
+ */
+goog.cloneObject = function(obj) {
+  var type = goog.typeOf(obj);
+  if (type == 'object' || type == 'array') {
+    if (obj.clone) {
+      return obj.clone();
+    }
+    var clone = type == 'array' ? [] : {};
+    for (var key in obj) {
+      clone[key] = goog.cloneObject(obj[key]);
+    }
+    return clone;
+  }
+
+  return obj;
+};
+
+
+/**
+ * Forward declaration for the clone method. This is necessary until the
+ * compiler can better support duck-typing constructs as used in
+ * goog.cloneObject.
+ *
+ * TODO(brenneman): Remove once the JSCompiler can infer that the check for
+ * proto.clone is safe in goog.cloneObject.
+ *
+ * @type {Function}
+ */
+Object.prototype.clone;
+
+
+/**
+ * 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. If the value is null or undefined, it
+ *     will default to the global object.
+ * @param {...*} var_args Additional arguments that are partially
+ *     applied to the function.
+ * @return {!Function} A partially-applied form of the function bind() was
+ *     invoked as a method of.
+ * @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} */ (Function.prototype.call.apply(
+      Function.prototype.bind, arguments));
+};
+
+
+/**
+ * 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. If the value is null or undefined, it
+ *     will default to the global object.
+ * @param {...*} var_args Additional arguments that are partially
+ *     applied to the function.
+ * @return {!Function} A partially-applied form of the function bind() was
+ *     invoked as a method of.
+ * @private
+ */
+goog.bindJs_ = function(fn, selfObj, var_args) {
+  var context = selfObj || goog.global;
+
+  if (arguments.length > 2) {
+    var boundArgs = Array.prototype.slice.call(arguments, 2);
+    return function() {
+      // Prepend the bound arguments to the current arguments.
+      var newArgs = Array.prototype.slice.call(arguments);
+      Array.prototype.unshift.apply(newArgs, boundArgs);
+      return fn.apply(context, newArgs);
+    };
+
+  } else {
+    return function() {
+      return fn.apply(context, arguments);
+    };
+  }
+};
+
+
+/**
+ * Partially applies this function to a particular 'this object' and zero or
+ * more arguments. The result is a new function with some arguments of the first
+ * function pre-filled and the value of |this| 'pre-specified'.<br><br>
+ *
+ * Remaining arguments specified at call-time are appended to the pre-
+ * specified ones.<br><br>
+ *
+ * Also see: {@link #partial}.<br><br>
+ *
+ * Usage:
+ * <pre>var barMethBound = bind(myFunction, myObj, 'arg1', 'arg2');
+ * barMethBound('arg3', 'arg4');</pre>
+ *
+ * @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. If the value is null or undefined, it
+ *     will default to the global object.
+ * @param {...*} var_args Additional arguments that are partially
+ *     applied to the function.
+ * @return {!Function} A partially-applied form of the function bind() was
+ *     invoked as a method of.
+ * @suppress {deprecated} See above.
+ */
+goog.bind = function(fn, selfObj, var_args) {
+  // TODO(nicksantos): narrow the type signature.
+  if (Function.prototype.bind &&
+      // NOTE(nicksantos): Somebody pulled base.js into the default
+      // Chrome extension environment. This means that for Chrome extensions,
+      // they get the implementation of Function.prototype.bind that
+      // calls goog.bind instead of the native one. Even worse, we don't want
+      // to introduce a circular dependency between goog.bind and
+      // Function.prototype.bind, so we have to hack this to make sure it
+      // works correctly.
+      Function.prototype.bind.toString().indexOf('native code') != -1) {
+    goog.bind = goog.bindNative_;
+  } else {
+    goog.bind = goog.bindJs_;
+  }
+  return goog.bind.apply(null, arguments);
+};
+
+
+/**
+ * Like bind(), except that a 'this object' is not required. Useful when the
+ * target function is already bound.
+ *
+ * Usage:
+ * var g = partial(f, arg1, arg2);
+ * g(arg3, arg4);
+ *
+ * @param {Function} fn A function to partially apply.
+ * @param {...*} var_args Additional arguments that are partially
+ *     applied to fn.
+ * @return {!Function} A partially-applied form of the function bind() was
+ *     invoked as a method of.
+ */
+goog.partial = function(fn, var_args) {
+  var args = Array.prototype.slice.call(arguments, 1);
+  return function() {
+    // Prepend the bound arguments to the current arguments.
+    var newArgs = Array.prototype.slice.call(arguments);
+    newArgs.unshift.apply(newArgs, args);
+    return fn.apply(this, newArgs);
+  };
+};
+
+
+/**
+ * Copies all the members of a source object to a target object. This method
+ * does not work on all browsers for all objects that contain keys such as
+ * toString or hasOwnProperty. Use goog.object.extend for this purpose.
+ * @param {Object} target Target.
+ * @param {Object} source Source.
+ */
+goog.mixin = function(target, source) {
+  for (var x in source) {
+    target[x] = source[x];
+  }
+
+  // For IE7 or lower, the for-in-loop does not contain any properties that are
+  // not enumerable on the prototype object (for example, isPrototypeOf from
+  // Object.prototype) but also it will not include 'replace' on objects that
+  // extend String and change 'replace' (not that it is common for anyone to
+  // extend anything except Object).
+};
+
+
+/**
+ * @return {number} An integer value representing the number of milliseconds
+ *     between midnight, January 1, 1970 and the current time.
+ */
+goog.now = Date.now || (function() {
+  // Unary plus operator converts its operand to a number which in the case of
+  // a date is done by calling getTime().
+  return +new Date();
+});
+
+
+/**
+ * Evals javascript in the global scope.  In IE this uses execScript, other
+ * browsers use goog.global.eval. If goog.global.eval does not evaluate in the
+ * global scope (for example, in Safari), appends a script tag instead.
+ * Throws an exception if neither execScript or eval is defined.
+ * @param {string} script JavaScript string.
+ */
+goog.globalEval = function(script) {
+  if (goog.global.execScript) {
+    goog.global.execScript(script, 'JavaScript');
+  } else if (goog.global.eval) {
+    // Test to see if eval works
+    if (goog.evalWorksForGlobals_ == null) {
+      goog.global.eval('var _et_ = 1;');
+      if (typeof goog.global['_et_'] != 'undefined') {
+        delete goog.global['_et_'];
+        goog.evalWorksForGlobals_ = true;
+      } else {
+        goog.evalWorksForGlobals_ = false;
+      }
+    }
+
+    if (goog.evalWorksForGlobals_) {
+      goog.global.eval(script);
+    } else {
+      var doc = goog.global.document;
+      var scriptElt = doc.createElement('script');
+      scriptElt.type = 'text/javascript';
+      scriptElt.defer = false;
+      // Note(pupius): can't use .innerHTML since "t('<test>')" will fail and
+      // .text doesn't work in Safari 2.  Therefore we append a text node.
+      scriptElt.appendChild(doc.createTextNode(script));
+      doc.body.appendChild(scriptElt);
+      doc.body.removeChild(scriptElt);
+    }
+  } else {
+    throw Error('goog.globalEval not available');
+  }
+};
+
+
+/**
+ * A macro for defining composite types.
+ *
+ * By assigning goog.typedef to a name, this tells JSCompiler that this is not
+ * the name of a class, but rather it's the name of a composite type.
+ *
+ * For example,
+ * /** @type {Array|NodeList} / goog.ArrayLike = goog.typedef;
+ * will tell JSCompiler to replace all appearances of goog.ArrayLike in type
+ * definitions with the union of Array and NodeList.
+ *
+ * Does nothing in uncompiled code.
+ *
+ * @deprecated Please use the {@code. @typedef} annotation.
+ */
+goog.typedef = true;
+
+
+/**
+ * Optional map of CSS class names to obfuscated names used with
+ * goog.getCssName().
+ * @type {Object|undefined}
+ * @private
+ * @see goog.setCssNameMapping
+ */
+goog.cssNameMapping_;
+
+
+/**
+ * Handles strings that are intended to be used as CSS class names.
+ *
+ * Without JS Compiler the arguments are simple joined with a hyphen and passed
+ * through unaltered.
+ *
+ * With the JS Compiler the arguments are inlined, e.g:
+ *     var x = goog.getCssName('foo');
+ *     var y = goog.getCssName(this.baseClass, 'active');
+ *  becomes:
+ *     var x= 'foo';
+ *     var y = this.baseClass + '-active';
+ *
+ * If a CSS renaming map is passed to the compiler it will replace symbols in
+ * the classname.  If one argument is passed it will be processed, if two are
+ * passed only the modifier will be processed, as it is assumed the first
+ * argument was generated as a result of calling goog.getCssName.
+ *
+ * Names are split on 'hyphen' and processed in parts such that the following
+ * are equivalent:
+ *   var base = goog.getCssName('baseclass');
+ *   goog.getCssName(base, 'modifier');
+ *   goog.getCSsName('baseclass-modifier');
+ *
+ * If any part does not appear in the renaming map a warning is logged and the
+ * original, unobfuscated class name is inlined.
+ *
+ * @param {string} className The class name.
+ * @param {string=} opt_modifier A modifier to be appended to the class name.
+ * @return {string} The class name or the concatenation of the class name and
+ *     the modifier.
+ */
+goog.getCssName = function(className, opt_modifier) {
+  var cssName = className + (opt_modifier ? '-' + opt_modifier : '');
+  return (goog.cssNameMapping_ && (cssName in goog.cssNameMapping_)) ?
+      goog.cssNameMapping_[cssName] : cssName;
+};
+
+
+/**
+ * Sets the map to check when returning a value from goog.getCssName(). Example:
+ * <pre>
+ * goog.setCssNameMapping({
+ *   "goog-menu": "a",
+ *   "goog-menu-disabled": "a-b",
+ *   "CSS_LOGO": "b",
+ *   "hidden": "c"
+ * });
+ *
+ * // The following evaluates to: "a a-b".
+ * goog.getCssName('goog-menu') + ' ' + goog.getCssName('goog-menu', 'disabled')
+ * </pre>
+ * When declared as a map of string literals to string literals, the JSCompiler
+ * will replace all calls to goog.getCssName() using the supplied map if the
+ * --closure_pass flag is set.
+ *
+ * @param {!Object} mapping A map of strings to strings where keys are possible
+ *     arguments to goog.getCssName() and values are the corresponding values
+ *     that should be returned.
+ */
+goog.setCssNameMapping = function(mapping) {
+  goog.cssNameMapping_ = mapping;
+};
+
+
+/**
+ * Abstract implementation of goog.getMsg for use with localized messages.
+ * @param {string} str Translatable string, places holders in the form {$foo}.
+ * @param {Object=} opt_values Map of place holder name to value.
+ * @return {string} message with placeholders filled.
+ */
+goog.getMsg = function(str, opt_values) {
+  var values = opt_values || {};
+  for (var key in values) {
+    var value = ('' + values[key]).replace(/\$/g, '$$$$');
+    str = str.replace(new RegExp('\\{\\$' + key + '\\}', 'gi'), value);
+  }
+  return str;
+};
+
+
+/**
+ * Exposes an unobfuscated global namespace path for the given object.
+ * Note that fields of the exported object *will* be obfuscated,
+ * unless they are exported in turn via this function or
+ * goog.exportProperty
+ *
+ * <p>Also handy for making public items that are defined in anonymous
+ * closures.
+ *
+ * ex. goog.exportSymbol('Foo', Foo);
+ *
+ * ex. goog.exportSymbol('public.path.Foo.staticFunction',
+ *                       Foo.staticFunction);
+ *     public.path.Foo.staticFunction();
+ *
+ * ex. goog.exportSymbol('public.path.Foo.prototype.myMethod',
+ *                       Foo.prototype.myMethod);
+ *     new public.path.Foo().myMethod();
+ *
+ * @param {string} publicPath Unobfuscated name to export.
+ * @param {*} object Object the name should point to.
+ * @param {Object=} opt_objectToExportTo The object to add the path to; default
+ *     is |goog.global|.
+ */
+goog.exportSymbol = function(publicPath, object, opt_objectToExportTo) {
+  goog.exportPath_(publicPath, object, opt_objectToExportTo);
+};
+
+
+/**
+ * Exports a property unobfuscated into the object's namespace.
+ * ex. goog.exportProperty(Foo, 'staticFunction', Foo.staticFunction);
+ * ex. goog.exportProperty(Foo.prototype, 'myMethod', Foo.prototype.myMethod);
+ * @param {Object} object Object whose static property is being exported.
+ * @param {string} publicName Unobfuscated name to export.
+ * @param {*} symbol Object the name should point to.
+ */
+goog.exportProperty = function(object, publicName, symbol) {
+  object[publicName] = symbol;
+};
+
+
+/**
+ * Inherit the prototype methods from one constructor into another.
+ *
+ * Usage:
+ * <pre>
+ * function ParentClass(a, b) { }
+ * ParentClass.prototype.foo = function(a) { }
+ *
+ * function ChildClass(a, b, c) {
+ *   ParentClass.call(this, a, b);
+ * }
+ *
+ * goog.inherits(ChildClass, ParentClass);
+ *
+ * var child = new ChildClass('a', 'b', 'see');
+ * child.foo(); // works
+ * </pre>
+ *
+ * In addition, a superclass' implementation of a method can be invoked
+ * as follows:
+ *
+ * <pre>
+ * ChildClass.prototype.foo = function(a) {
+ *   ChildClass.superClass_.foo.call(this, a);
+ *   // other code
+ * };
+ * </pre>
+ *
+ * @param {Function} childCtor Child class.
+ * @param {Function} parentCtor Parent class.
+ */
+goog.inherits = function(childCtor, parentCtor) {
+  /** @constructor */
+  function tempCtor() {};
+  tempCtor.prototype = parentCtor.prototype;
+  childCtor.superClass_ = parentCtor.prototype;
+  childCtor.prototype = new tempCtor();
+  childCtor.prototype.constructor = childCtor;
+};
+
+
+/**
+ * Call up to the superclass.
+ *
+ * If this is called from a constructor, then this calls the superclass
+ * contructor with arguments 1-N.
+ *
+ * If this is called from a prototype method, then you must pass
+ * the name of the method as the second argument to this function. If
+ * you do not, you will get a runtime error. This calls the superclass'
+ * method with arguments 2-N.
+ *
+ * This function only works if you use goog.inherits to express
+ * inheritance relationships between your classes.
+ *
+ * This function is a compiler primitive. At compile-time, the
+ * compiler will do macro expansion to remove a lot of
+ * the extra overhead that this function introduces. The compiler
+ * will also enforce a lot of the assumptions that this function
+ * makes, and treat it as a compiler error if you break them.
+ *
+ * @param {!Object} me Should always be "this".
+ * @param {*=} opt_methodName The method name if calling a super method.
+ * @param {...*} var_args The rest of the arguments.
+ * @return {*} The return value of the superclass method.
+ */
+goog.base = function(me, opt_methodName, var_args) {
+  var caller = arguments.callee.caller;
+  if (caller.superClass_) {
+    // This is a constructor. Call the superclass constructor.
+    return caller.superClass_.constructor.apply(
+        me, Array.prototype.slice.call(arguments, 1));
+  }
+
+  var args = Array.prototype.slice.call(arguments, 2);
+  var foundCaller = false;
+  for (var ctor = me.constructor;
+       ctor; ctor = ctor.superClass_ && ctor.superClass_.constructor) {
+    if (ctor.prototype[opt_methodName] === caller) {
+      foundCaller = true;
+    } else if (foundCaller) {
+      return ctor.prototype[opt_methodName].apply(me, args);
+    }
+  }
+
+  // If we did not find the caller in the prototype chain,
+  // then one of two things happened:
+  // 1) The caller is an instance method.
+  // 2) This method was not called by the right caller.
+  if (me[opt_methodName] === caller) {
+    return me.constructor.prototype[opt_methodName].apply(me, args);
+  } else {
+    throw Error(
+        'goog.base called from a method of one name ' +
+        'to a method of a different name');
+  }
+};
+
+
+/**
+ * Allow for aliasing within scope functions.  This function exists for
+ * uncompiled code - in compiled code the calls will be inlined and the
+ * aliases applied.  In uncompiled code the function is simply run since the
+ * aliases as written are valid JavaScript.
+ * @param {function()} fn Function to call.  This function can contain aliases
+ *     to namespaces (e.g. "var dom = goog.dom") or classes
+ *    (e.g. "var Timer = goog.Timer").
+ */
+goog.scope = function(fn) {
+  fn.call(goog.global);
+};
+
+
+// MOE:begin_strip
+
+// The section between this token and the end token below will be stripped
+// automatically by the open source release scripts.  Please leave in place.
+
+//==============================================================================
+// Extending Function
+//==============================================================================
+
+
+/**
+ * @define {boolean} Whether to extend Function.prototype.
+ *     Use --define='goog.MODIFY_FUNCTION_PROTOTYPES=false' to change.
+ */
+goog.MODIFY_FUNCTION_PROTOTYPES = true;
+
+if (goog.MODIFY_FUNCTION_PROTOTYPES) {
+  /**
+   * An alias to the {@link goog.bind()} global function.
+   *
+   * Usage:
+   * var g = f.bind(obj, arg1, arg2);
+   * g(arg3, arg4);
+   *
+   * @param {Object} selfObj Specifies the object to which |this| should point
+   *     when the function is run. If the value is null or undefined, it will
+   *     default to the global object.
+   * @param {...*} var_args Additional arguments that are partially
+   *     applied to fn.
+   * @return {!Function} A partially-applied form of the Function on which
+   *     bind() was invoked as a method.
+   * @deprecated Use the static function goog.bind instead.
+   * @suppress {duplicate}
+   */
+  Function.prototype.bind =
+      Function.prototype.bind || function(selfObj, var_args) {
+    if (arguments.length > 1) {
+      var args = Array.prototype.slice.call(arguments, 1);
+      args.unshift(this, selfObj);
+      return goog.bind.apply(null, args);
+    } else {
+      return goog.bind(this, selfObj);
+    }
+  };
+
+
+  /**
+   * An alias to the {@link goog.partial()} static function.
+   *
+   * Usage:
+   * var g = f.partial(arg1, arg2);
+   * g(arg3, arg4);
+   *
+   * @param {...*} var_args Additional arguments that are partially
+   *     applied to fn.
+   * @return {!Function} A partially-applied form of the function partial() was
+   *     invoked as a method of.
+   * @deprecated Use the static function goog.partial instead.
+   */
+  Function.prototype.partial = function(var_args) {
+    var args = Array.prototype.slice.call(arguments);
+    args.unshift(this, null);
+    return goog.bind.apply(null, args);
+  };
+
+
+  /**
+   * Inherit the prototype methods from one constructor into another.
+   * @param {Function} parentCtor Parent class.
+   * @see goog.inherits
+   * @deprecated Use the static function goog.inherits instead.
+   */
+  Function.prototype.inherits = function(parentCtor) {
+    goog.inherits(this, parentCtor);
+  };
+
+
+  /**
+   * Mixes in an object's properties and methods into the callee's prototype.
+   * Basically mixin based inheritance, thus providing an alternative method for
+   * adding properties and methods to a class' prototype.
+   *
+   * <pre>
+   * function X() {}
+   * X.mixin({
+   *   one: 1,
+   *   two: 2,
+   *   three: 3,
+   *   doit: function() { return this.one + this.two + this.three; }
+   * });
+   *
+   * function Y() { }
+   * Y.mixin(X.prototype);
+   * Y.prototype.four = 15;
+   * Y.prototype.doit2 = function() { return this.doit() + this.four; }
+   * });
+   *
+   * // or
+   *
+   * function Y() { }
+   * Y.inherits(X);
+   * Y.mixin({
+   *   one: 10,
+   *   four: 15,
+   *   doit2: function() { return this.doit() + this.four; }
+   * });
+   * </pre>
+   *
+   * @param {Object} source from which to copy properties.
+   * @see goog.mixin
+   * @deprecated Use the static function goog.object.extend instead.
+   */
+  Function.prototype.mixin = function(source) {
+    goog.mixin(this.prototype, source);
+  };
+}
+
+// MOE:end_strip