Update Chromoting to use /third_party/closure_compiler.

remoting/webapp/crd/js/oauth2.js

 // Copyright (c) 2012 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
  * OAuth2 class that handles retrieval/storage of an OAuth2 token.
  *
  * Uses a content script to trampoline the OAuth redirect page back into the
  * extension context.  This works around the lack of native support for
@@ skipping 138 matching lines @@
   window.localStorage.setItem(this.KEY_ACCESS_TOKEN_,
                               JSON.stringify(access_token));
 };
 
 /**
  * Returns the current access token, setting it to a invalid value if none
  * existed before.
  *
  * @private
  * @return {{token: string, expiration: number}} The current access token, or
- * an invalid token if not authenticated.
+ *     an invalid token if not authenticated.
  */
 remoting.OAuth2.prototype.getAccessTokenInternal_ = function() {
   if (!window.localStorage.getItem(this.KEY_ACCESS_TOKEN_)) {
     // Always be able to return structured data.
     this.setAccessToken_('', 0);
   }
   var accessToken = window.localStorage.getItem(this.KEY_ACCESS_TOKEN_);
   if (typeof accessToken == 'string') {
     var result = base.jsonParseSafe(accessToken);
     if (result && 'token' in result && 'expiration' in result) {
-      return /** @type {{token: string, expiration: number}} */ result;
+      return /** @type {{token: string, expiration: number}} */(result);
     }
   }
   console.log('Invalid access token stored.');
   return {'token': '', 'expiration': 0};
 };
 
 /**
  * Returns true if the access token is expired, or otherwise invalid.
  *
  * Will throw if !isAuthenticated().
@@ skipping 276 matching lines @@
  * @return {?string} The user's full name, if it has been cached by a previous
  * call to getUserInfo, otherwise null.
  */
 remoting.OAuth2.prototype.getCachedUserFullName = function() {
   var value = window.localStorage.getItem(this.KEY_FULLNAME_);
   if (typeof value == 'string') {
     return value;
   }
   return null;
 };