[AppRemoting] Break out AppRemoting shared module (re-land).

remoting/webapp/crd/js/desktop_remoting_activity.js

 // Copyright 2015 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.
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 (function() {
 
 'use strict';
@@ skipping 10 matching lines @@
  */
 remoting.DesktopRemotingActivity = function(parentActivity) {
   /** @private */
   this.parentActivity_ = parentActivity;
   /** @private {remoting.DesktopConnectedView} */
   this.connectedView_ = null;
 
   /** @private */
   this.sessionFactory_ = new remoting.ClientSessionFactory(
       document.querySelector('#client-container .client-plugin-container'),
-      remoting.app_capabilities());
+      [/* No special capabilities required. */]);
 
   /** @private {remoting.ClientSession} */
   this.session_ = null;
   /** @private {remoting.ConnectingDialog} */
   this.connectingDialog_ =
       new remoting.ConnectingDialog(parentActivity.stop.bind(parentActivity));
 };
 
 /**
  * Initiates a connection.
@@ skipping 118 matching lines @@
 remoting.DesktopRemotingActivity.prototype.getSession = function() {
   return this.session_;
 };
 
 /** @return {remoting.ConnectingDialog} */
 remoting.DesktopRemotingActivity.prototype.getConnectingDialog = function() {
   return this.connectingDialog_;
 };
 
 })();