Move the Notification browser tests down to //content.

content/test/notifications/service_worker.js

Index: content/test/notifications/service_worker.js
diff --git a/chrome/test/data/notifications/platform_notification_service.js b/content/test/notifications/service_worker.js
similarity index 82%
copy from chrome/test/data/notifications/platform_notification_service.js
copy to content/test/notifications/service_worker.js
index 77816dd5a43dcaab5f50a003ecc0cd350baee6a6..711c8b4c6973016c5c2b245501190cee378ec2c9 100644
--- a/chrome/test/data/notifications/platform_notification_service.js
+++ b/content/test/notifications/service_worker.js
@@ -1,8 +1,8 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 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.
 
-// Service Worker to be used with the platform_notification_service.html page.
+// Service Worker to be used with the test.html page.
 var messagePort = null;
 
 addEventListener('message', function (event) {