Update Chromoting to use /third_party/closure_compiler.

remoting/webapp/unittests/chrome_mocks.js

 // Copyright 2014 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.
 
 // This file contains various mock objects for the chrome platform to make
 // unit testing easier.
 
+Entry = function() {};
+
 (function(scope){
 
 var chromeMocks = {};
 
 chromeMocks.Event = function() {
   this.listeners_ = [];
 };
 
 chromeMocks.Event.prototype.addListener = function(callback) {
   this.listeners_.push(callback);
@@ skipping 23 matching lines @@
   this.name = '';
   this.sender = null;
 };
 
 chromeMocks.runtime.Port.prototype.disconnect = function() {};
 chromeMocks.runtime.Port.prototype.postMessage = function() {};
 
 scope.chromeMocks = chromeMocks;
 
 })(window);