Updated remoting.xhr API to use promises. Removed access to the native

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 121 matching lines @@
   };
 
   /**
    * @param {boolean} response True if the feature is present.
    */
   var onHasFeatureResponse = function(response) {
     /**
      * @param {!remoting.Error} error
      */
     var onError = function(error) {
-      console.error('Failed to get pairing status: ' + error);
+      console.error('Failed to get pairing status: ' + error.toString());
       remoting.pairedClientManager.setPairedClients([]);
     };
 
     if (response) {
       remoting.hostController.getPairedClients(
           remoting.pairedClientManager.setPairedClients.bind(
               remoting.pairedClientManager),
           onError);
     } else {
       console.log('Pairing registry not supported by host.');
@@ skipping 28 matching lines @@
 }
 
 
 remoting.startDesktopRemoting = function() {
   remoting.app = new remoting.Application(remoting.app_capabilities());
   var desktop_remoting = new remoting.DesktopRemoting(remoting.app);
   remoting.app.start();
 };
 
 window.addEventListener('load', remoting.startDesktopRemotingForTesting, false);