Take notification API out of experimental.

chrome/test/data/extensions/api_test/notifications/api/by_user/background.js

Index: chrome/test/data/extensions/api_test/notifications/api/by_user/background.js
diff --git a/chrome/test/data/extensions/api_test/notification/api/by_user/background.js b/chrome/test/data/extensions/api_test/notifications/api/by_user/background.js
similarity index 70%
rename from chrome/test/data/extensions/api_test/notification/api/by_user/background.js
rename to chrome/test/data/extensions/api_test/notifications/api/by_user/background.js
index e87490556bb0fa8b56e52225234ca368a5a9b3ca..961fbeb6a69afbb235c4531da6898126387ed803 100644
--- a/chrome/test/data/extensions/api_test/notification/api/by_user/background.js
+++ b/chrome/test/data/extensions/api_test/notifications/api/by_user/background.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-const notification = chrome.experimental.notification;
+const notifications = chrome.experimental.notifications;
 var theOnlyTestDone = null;
 
 var notificationData = {
@@ -27,8 +27,8 @@ function createCallback(id) { }
 
 var onClosedHooks = {
   BIFF: function() {
-    notification.create("BLAT", notificationData, createCallback);
-    notification.create("BLOT", notificationData, createCallback);
+    notifications.create("BLAT", notificationData, createCallback);
+    notifications.create("BLOT", notificationData, createCallback);
   },
 };
 
@@ -48,15 +48,15 @@ function onClosedListener(id, by_user) {
     theOnlyTestDone();
 }
 
-notification.onClosed.addListener(onClosedListener);
+notifications.onClosed.addListener(onClosedListener);
 
 function theOnlyTest() {
   theOnlyTestDone = chrome.test.callbackAdded();
 
-  notification.create("FOO", notificationData, createCallback);
-  notification.create("BAR", notificationData, createCallback);
-  notification.create("BAT", notificationData, createCallback);
-  notification.create("BIFF", notificationData, createCallback);
+  notifications.create("FOO", notificationData, createCallback);
+  notifications.create("BAR", notificationData, createCallback);
+  notifications.create("BAT", notificationData, createCallback);
+  notifications.create("BIFF", notificationData, createCallback);
 }
 
 chrome.test.runTests([ theOnlyTest ]);