extensions: Migrate other uses of webkitNotifications to Web Notifications API.

chrome/common/extensions/docs/examples/api/notifications/background.js

 // Copyright (c) 2011 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.
 
 /*
   Displays a notification with the current time. Requires "notifications"
   permission in the manifest file (or calling
-  "webkitNotifications.requestPermission" beforehand).
+  "Notification.requestPermission" beforehand).
 */
 function show() {
   var time = /(..)(:..)/.exec(new Date());     // The prettyprinted time.
   var hour = time[1] % 12 || 12;               // The prettyprinted hour.
   var period = time[1] < 12 ? 'a.m.' : 'p.m.'; // The period of the day.
-  var notification = window.webkitNotifications.createNotification(
-    '48.png',                      // The image.
-    hour + time[2] + ' ' + period, // The title.
-    'Time to make the toast.'      // The body.
-  );
-  notification.show();
+  new Notification(hour + time[2] + ' ' + period, {
+    icon: '48.png',
+    body: 'Time to make the toast.'
+  });
 }
 
 // Conditionally initialize the options.
 if (!localStorage.isInitialized) {
   localStorage.isActivated = true;   // The display activation.
   localStorage.frequency = 1;        // The display frequency, in minutes.
   localStorage.isInitialized = true; // The option initialization.
 }
 
 // Test for notification support.
-if (window.webkitNotifications) {
+if ("Notification" in window) {

[not at google - send to devlin, 2014/08/01 16:52:28]

i preferred it the old way, "if (window.Notification)"

though honestly what's the point in feature detecting at this stage. it's a
sample for notifications :)

[tfarina, 2014/08/02 00:54:05]

Done.

   // While activated, show notifications at the display frequency.
   if (JSON.parse(localStorage.isActivated)) { show(); }
 
   var interval = 0; // The display interval, in minutes.
 
   setInterval(function() {
     interval++;
 
     if (
       JSON.parse(localStorage.isActivated) &&
         localStorage.frequency <= interval
     ) {
       show();
       interval = 0;
     }
   }, 60000);
 }