Update Notification and Background Sync partial interface exposure

third_party/WebKit/Source/modules/notifications/ServiceWorkerRegistrationNotifications.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
 
 [
-    Exposed=(Window, ServiceWorker),
+    Exposed=(Window,Worker),
     RuntimeEnabled=Notifications
 ] partial interface ServiceWorkerRegistration {
     [CallWith=ScriptState, RaisesException] Promise showNotification(DOMString title, optional NotificationOptions options);
     [CallWith=ScriptState] Promise<sequence<Notification>> getNotifications(optional GetNotificationOptions filter);
 };