Add data property in persistent web notification

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),
     RuntimeEnabled=ServiceWorkerNotifications
 ] partial interface ServiceWorkerRegistration {
-    [CallWith=ScriptState] Promise showNotification(DOMString title, optional NotificationOptions options);
+    [CallWith=ScriptState, RaisesException] Promise showNotification(DOMString title, optional NotificationOptions options);
 };