Only allows extensions to create HTML notifications.

chrome/test/data/extensions/api_test/notifications/has_permission_manifest/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.
 
 var notification = null;
 var chromeExtensionsUrl = "chrome://extensions/";
 
 // Shows the notification window using the specified URL.
 // Control continues at onNotificationDone().
 function showNotification(url) {
   notification = window.webkitNotifications.createHTMLNotification(url);
   notification.onerror = function() {
     chrome.test.fail("Failed to show notification.");
   };
   notification.show();
 }
 
 // Called by the notification when it is done with its tests.
 function onNotificationDone() {
   var views = chrome.extension.getViews();
   chrome.test.assertEq(2, views.length);
   notification.cancel();
 
   // This last step tests that crbug.com/40967 stays fixed.
   var listener = function(tabId, changeInfo, tab) {
     if (changeInfo.status != 'complete')
       return;
     // web_page1 loaded, open extension page to inject script
-    if (tab.url == chromeExtensionsUrl) {
-      console.log(chromeExtensionsUrl + ' finished loading.');
-      chrome.tabs.onUpdated.removeListener(listener);
-      chrome.test.succeed();
-    }
+    console.log(chromeExtensionsUrl + ' finished loading.');
+    chrome.tabs.onUpdated.removeListener(listener);
+    chrome.test.succeed();
   };
 
   chrome.tabs.onUpdated.addListener(listener);
   chrome.tabs.create({ url: chromeExtensionsUrl });
 }
 
 chrome.test.runTests([
   function hasPermission() {
     chrome.test.assertEq(0,  // allowed
                          webkitNotifications.checkPermission());
     chrome.test.succeed();
   },
   function absoluteURL() {
     showNotification(chrome.extension.getURL("notification.html"));
   },
   function relativeURL() {
     showNotification('notification.html');
   }
 ]);