Refactor about:sync's events framework

chrome/browser/resources/sync_internals/notifications.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.
 
 (function() {
 
 // TODO(akalin): Use table.js.
 
 function updateNotificationStateInfo(notificationState) {
   var notificationStateInfo = $('notificationStateInfo');
@@ skipping 60 matching lines @@
 }
 
 function updateNotificationInfo(notificationInfo) {
   updateNotificationsFromNotificationInfo(notificationInfo);
   updateNotificationInfoTable();
 }
 
 function onLoad() {
   chrome.sync.getNotificationState(updateNotificationStateInfo);
   chrome.sync.getNotificationInfo(updateNotificationInfo);
-  chrome.sync.onNotificationStateChange.addListener(
-      function(details) { updateNotificationStateInfo(details.state); });
 
-  chrome.sync.onIncomingNotification.addListener(function(details) {
-    var changedTypes = details.changedTypes;
+  chrome.sync.events.addEventListener(
+      'onNotificationStateChange',
+      function(e) {
+        updateNotificationStateInfo(e.details.state);
+      });
+
+  chrome.sync.events.addEventListener('onIncomingNotification', function(e) {
+    var changedTypes = e.details.changedTypes;
     for (var i = 0; i < changedTypes.length; ++i) {
       incrementSessionNotificationCount(changedTypes[i]);
     }
     updateNotificationInfoTable();
 
     // Also update total counts.
     chrome.sync.getNotificationInfo(updateNotificationInfo);
   });
 }
 
 document.addEventListener('DOMContentLoaded', onLoad, false);
 })();