Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

modules/notifications/ServiceWorkerGlobalScopeNotifications.idl

 // 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.
 
 // https://notifications.spec.whatwg.org/#service-worker-api
 
 [
-    RuntimeEnabled=ServiceWorkerNotifications,
+    RuntimeEnabled=Notifications,
 ] partial interface ServiceWorkerGlobalScope {
     attribute EventHandler onnotificationclick;
-    attribute EventHandler onnotificationerror;
+    attribute EventHandler onnotificationclose;
 };