Convert now component to use GCM rather than pushMessaging.

chrome/browser/resources/google_now/utility.js

 // Copyright (c) 2013 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';
 
 /**
  * @fileoverview Utility objects and functions for Google Now extension.
  * Most important entities here:
  * (1) 'wrapper' is a module used to add error handling and other services to
@@ skipping 964 matching lines @@
         if (chrome.runtime.lastError || !token) {
           reject();
         } else {
           resolve(token);
         }
       });
     });
   }
 
   /**
+   * Determines the active account's login (username).
+   * @return {Promise} A promise to determine the current account's login.
+   */
+  function getLogin() {
+    return new Promise(function(resolve) {
+      instrumented.webstorePrivate.getBrowserLogin(function(accountInfo) {
+        resolve(accountInfo.login);
+      });
+    });
+  }
+
+  /**
    * Determines whether there is an account attached to the profile.
    * @return {Promise} A promise to determine if there is an account attached
    *     to the profile.
    */
   function isSignedIn() {
-    return new Promise(function(resolve) {
-      instrumented.webstorePrivate.getBrowserLogin(function(accountInfo) {
-        resolve(!!accountInfo.login);
-      });
+    return getLogin().then(function(login) {
+      return Promise.resolve(!!login);
     });
   }
 
   /**
    * Removes the specified cached token.
    * @param {string} token Authentication Token to remove from the cache.
    * @return {Promise} A promise that resolves on completion.
    */
   function removeToken(token) {
     return new Promise(function(resolve) {
@@ skipping 44 matching lines @@
       checkAndNotifyListeners();
   });
 
   // Poll for the sign in state every hour.
   // One hour is just an arbitrary amount of time chosen.
   chrome.alarms.create(alarmName, {periodInMinutes: 60});
 
   return {
     addListener: addListener,
     getAuthToken: getAuthToken,
+    getLogin: getLogin,
     isSignedIn: isSignedIn,
     removeToken: removeToken
   };
 }