Update Chromoting to use /third_party/closure_compiler.

remoting/webapp/crd/js/menu_button.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
  * Class representing a menu button and its associated menu items.
  */
 
 'use strict';
@@ skipping 88 matching lines @@
 };
 
 /**
  * Set or unset the selected state of an <li> menu item.
  * @param {Element} item The menu item to update.
  * @param {boolean} selected True to select the item, false to deselect it.
  * @return {void} Nothing.
  */
 remoting.MenuButton.select = function(item, selected) {
   if (selected) {
-    /** @type {DOMTokenList} */(item.classList).add('selected');
+    item.classList.add('selected');
   } else {
-    /** @type {DOMTokenList} */(item.classList).remove('selected');
+    item.classList.remove('selected');
   }
 };
 
 /** @const @private */
 remoting.MenuButton.BUTTON_ACTIVE_CLASS_ = 'active';