Now component extension (v1): unregister from GCM on startup

chrome/browser/resources/google_now/background.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 The event page for Google Now for Chrome implementation.
  * The Google Now event page gets Google Now cards from the server and shows
  * them as Chrome notifications.
@@ skipping 184 matching lines @@
   }
 
   return false;
 }
 
 var tasks = buildTaskManager(areTasksConflicting);
 
 // Add error processing to API calls.
 wrapper.instrumentChromeApiFunction('gcm.onMessage.addListener', 0);
 wrapper.instrumentChromeApiFunction('gcm.register', 1);
+wrapper.instrumentChromeApiFunction('gcm.unregister', 0);
 wrapper.instrumentChromeApiFunction('metricsPrivate.getVariationParams', 1);
 wrapper.instrumentChromeApiFunction('notifications.clear', 1);
 wrapper.instrumentChromeApiFunction('notifications.create', 2);
 wrapper.instrumentChromeApiFunction('notifications.getPermissionLevel', 0);
 wrapper.instrumentChromeApiFunction('notifications.update', 2);
 wrapper.instrumentChromeApiFunction('notifications.getAll', 0);
 wrapper.instrumentChromeApiFunction(
     'notifications.onButtonClicked.addListener', 0);
 wrapper.instrumentChromeApiFunction('notifications.onClicked.addListener', 0);
 wrapper.instrumentChromeApiFunction('notifications.onClosed.addListener', 0);
@@ skipping 805 matching lines @@
   // We don't clear localStorage since those values are still relevant
   // across Google Now start-stop events.
   chrome.storage.local.clear();
 }
 
 /**
  * Initializes the event page on install or on browser startup.
  */
 function initialize() {
   recordEvent(GoogleNowEvent.EXTENSION_START);
-  registerForGcm();
+  // TODO(skare): Reenable, after signin.
+  unregisterFromGcm();
   onStateChange();
 }
 
 /**
  * Starts or stops the main pipeline for polling cards.
  * @param {boolean} shouldPollCardsRequest true to start and
  *     false to stop polling cards.
  */
 function setShouldPollCards(shouldPollCardsRequest) {
   updateCardsAttempts.isRunning(function(currentValue) {
@@ skipping 263 matching lines @@
               resolve(registrationId);
             } else {
               reject();
             }
           });
         });
       });
 }
 
 /**
+ * Unregisters from GCM if previously registered.
+ */
+function unregisterFromGcm() {
+  fillFromChromeLocalStorage({gcmRegistrationId: undefined})
+      .then(function(items) {
+        if (items.gcmRegistrationId) {
+          console.log('Unregistering from gcm.');
+          instrumented.gcm.unregister(function() {
+            if (!chrome.runtime.lastError) {
+              chrome.storage.local.remove(
+                ['gcmNotificationKey', 'gcmRegistrationId']);
+            }
+          });
+        }
+      });
+}
+
+/**
  * Polls the optin state.
  * Sometimes we get the response to the opted in result too soon during
  * push messaging. We'll recheck the optin state a few times before giving up.
  */
 function pollOptedInWithRecheck() {
   /**
    * Cleans up any state used to recheck the opt-in poll.
    */
   function clearPollingState() {
     localStorage.removeItem('optedInCheckCount');
@@ skipping 146 matching lines @@
             lastPollNowPayloads: items.lastPollNowPayloads,
             notificationGroups: items.notificationGroups
           });
 
           pollOptedInWithRecheck();
         }
       });
     });
   }
 });