Use SaveSameObject for Notification.data as well

third_party/WebKit/Source/modules/notifications/Notification.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 123 matching lines @@
     void prepareShow();
 
     // Shows the notification, using the resources loaded by the
     // NotificationResourcesLoader.
     void didLoadResources(NotificationResourcesLoader*);
 
     void setPersistentId(int64_t persistentId) { m_persistentId = persistentId; }
 
     WebNotificationData m_data;
 
-    // ScriptValue representations of the developer-associated data. Initialized lazily on first access.
-    ScriptValue m_developerData;
-
     // Notifications can either be bound to the page, which means they're identified by
     // their delegate, or persistent, which means they're identified by a persistent Id
     // given to us by the embedder. This influences how we close the notification.
     int64_t m_persistentId;
 
     enum NotificationState {
         NotificationStateIdle,
         NotificationStateShowing,
         NotificationStateClosing,
         NotificationStateClosed
     };
 
     // Only to be used by the Notification::create() method when notifications were created
     // by the embedder rather than by Blink.
     void setState(NotificationState state) { m_state = state; }
 
     NotificationState m_state;
 
     Member<AsyncMethodRunner<Notification>> m_prepareShowMethodRunner;
 
     Member<NotificationResourcesLoader> m_loader;
 };
 
 } // namespace blink
 
 #endif // Notification_h