Take notification API out of experimental.

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

Index: chrome/test/data/extensions/api_test/notifications/api/events/background.js
diff --git a/chrome/test/data/extensions/api_test/notification/api/events/background.js b/chrome/test/data/extensions/api_test/notifications/api/events/background.js
similarity index 81%
rename from chrome/test/data/extensions/api_test/notification/api/events/background.js
rename to chrome/test/data/extensions/api_test/notifications/api/events/background.js
index 7aa21ec9324ee3b1f6a44818b55bd7b4733ae1d4..f17b743cf81953f4bcd53517cf1afa6b5285674c 100644
--- a/chrome/test/data/extensions/api_test/notification/api/events/background.js
+++ b/chrome/test/data/extensions/api_test/notifications/api/events/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.notifications;
 
 var idString = "foo";
 
@@ -22,7 +22,7 @@ var testBasicEvents = function() {
       chrome.test.succeed();
     }
   }
-  notification.onDisplayed.addListener(onDisplayed);
+  notifications.onDisplayed.addListener(onDisplayed);
 
   var options = {
     templateType: "basic",
@@ -30,7 +30,9 @@ var testBasicEvents = function() {
     title: "Attention!",
     message: "Check out Cirque du Soleil"
   };
-  notification.create(idString, options, onCreateCallback);
+  notifications.create(idString, options, onCreateCallback);
+
 };
 
+
 chrome.test.runTests([ testBasicEvents ]);