Add NotifyOnPermissionLevelChanged implementation of notification

chrome/test/data/extensions/api_test/notification_provider/basic_usage/background.js

 // Copyright 2014 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.
 
 const notificationProvider = chrome.notificationProvider;
 
 var myId = chrome.runtime.id;
 var id1 = "id1";
 var returnId = myId + "-" + id1;
 var content = {
@@ skipping 142 matching lines @@
   createNotification(id1, content)
       .catch(function() { failTest("notifications.create"); })
       // Try to notify that an non-existent notification was cleared.
       .then(function () { return notifyOnCleared(myId, "doesNotExist"); })
       .then(function() { failTest("NotifyOnCleared"); })
       // Notify that the original notification was cleared.
       .catch(function() { return notifyOnCleared(myId, returnId); })
       .catch(function() { failTest("NotifyOnCleared"); });
 }
 
+function testNotifyOnPermissionLevelChanged() {
+  chrome.notifications.onPermissionLevelChanged.addListener(function(level) {
+    chrome.test.succeed();
+  });
+
+  // Create a notification, so there will be one existing notification.
+  createNotification(id1, content)
+      .catch(function() { failTest("notifications.create"); })
+      // Try to notify a web type notifier its permissional level is changed.
+      .then(function() { return notifyOnPermissionLevelChanged("SomeURL",
+                                                               "web",
+                                                               "granted"); })
+      .then(function() { failTest("NotifyOnPermissionLevelChanged"); })
+      // Notify that the permission level of current notifier is changed.
+      .catch(function () { return notifyOnPermissionLevelChanged(myId,
+                                                                 "application",
+                                                                 "granted"); })
+      .catch(function() { failTest("NotifyOnPermissionLevelChanged"); });
+}
+
 function testNotifyOnShowSettings() {
   chrome.notifications.onShowSettings.addListener(function() {
     chrome.test.succeed();
   });
 
   // Create a notification, so there will be one existing notification.
   createNotification(id1, content)
       .catch(function() { failTest("notifications.create"); })
       // Try to notify a non existent sender that a user checked its settings.
       .then(function () { return notifyOnShowSettings("DoesNotExist",
                                                       "application"); })
       // Fail if it returns true.
       .then(function() { failTest("NotifyOnShowSettings"); })
       // Notify current notifier that a user checked its settings.
       .catch(function () { return notifyOnShowSettings(myId, "application"); })
-      .catch(function() { failTest("NotifyOnShowSettings"); })
+      .catch(function() { failTest("NotifyOnShowSettings"); });
 }
 
 chrome.test.runTests([ testNotifyOnClicked,
                        testNotifyOnButtonClicked,
                        testNotifyOnClosed,
+                       testNotifyOnPermissionLevelChanged,
                        testNotifyOnShowSettings ]);