[Chromoting] Change Application.Delegate to proper subclass of Application.

remoting/webapp/crd/js/crd_main.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.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /**
@@ skipping 182 matching lines @@
     remoting.handleAuthFailureAndRelaunch();
   } else {
     document.getElementById('token-refresh-auth-failed').hidden = !auth_failed;
     document.getElementById('token-refresh-other-error').hidden = auth_failed;
     remoting.setMode(remoting.AppMode.TOKEN_REFRESH_FAILED);
   }
 };
 
 
 remoting.startDesktopRemoting = function() {
-  remoting.app = new remoting.Application(remoting.app_capabilities());
-  var desktop_remoting = new remoting.DesktopRemoting(remoting.app);
+  remoting.app = new remoting.DesktopRemoting(remoting.app_capabilities());
   remoting.app.start();
 };
 
 window.addEventListener('load', remoting.startDesktopRemotingForTesting, false);