Update Chromoting to use /third_party/closure_compiler.

remoting/webapp/crd/js/butter_bar.js

 // Copyright 2013 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
  * ButterBar class that is used to show the butter bar with various
  * notifications.
  */
 
@@ skipping 33 matching lines @@
  * @param {string} storageKey
  * @private
  */
 remoting.ButterBar.prototype.show_ =
     function(messageId, substitutions, storageKey) {
   this.storageKey_ = storageKey;
 
   var messageElement = document.getElementById(remoting.ButterBar.kMessageId_);
   l10n.localizeElementFromTag(messageElement, messageId, substitutions, true);
   var acceptLink =
-      /** @type{Element} */ messageElement.getElementsByTagName('a')[0];
+      /** @type{Element} */ (messageElement.getElementsByTagName('a')[0]);
   acceptLink.addEventListener(
       'click', this.dismiss.bind(this, true), false);
 
   document.getElementById(remoting.ButterBar.kDismissId_).addEventListener(
       'click', this.dismiss.bind(this, false), false);
 
   document.getElementById(remoting.ButterBar.kId_).hidden = false;
 }
 
 /**
@@ skipping 62 matching lines @@
   var value = {};
   value[this.storageKey_] = {
     optIn: accepted,
     date: new Date(),
     version: chrome.runtime.getManifest().version
   };
   chrome.storage.sync.set(value);
 
   document.getElementById(remoting.ButterBar.kId_).hidden = true;
 };