Changed identity API to use promises instead of callbacks.

remoting/webapp/crd/js/remoting.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.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /**
@@ skipping 91 matching lines @@
   }
 };
 
 /**
  * Sign the user out of Chromoting by clearing (and revoking, if possible) the
  * OAuth refresh token.
  *
  * Also clear all local storage, to avoid leaking information.
  */
 remoting.signOut = function() {
-  remoting.oauth2.removeCachedAuthToken(function(){
+  remoting.oauth2.removeCachedAuthToken().then(function(){
     chrome.storage.local.clear();
     remoting.setMode(remoting.AppMode.HOME);
     window.location.reload();
   });
 };
 
 /**
  * Callback function called when the browser window gets a paste operation.
  *
  * @param {Event} event
@@ skipping 84 matching lines @@
     } else {
       chrome.windows.get(tab.windowId, null, windowCallback);
     }
   };
   if (chrome.tabs) {
     chrome.tabs.getCurrent(tabCallback);
   } else {
     console.error('chome.tabs is not available.');
   }
 }