Add Notification images (Blink + desktop implementation)

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 72 matching lines @@
     void dispatchShowEvent() override;
     void dispatchClickEvent() override;
     void dispatchErrorEvent() override;
     void dispatchCloseEvent() override;
 
     String title() const;
     String dir() const;
     String lang() const;
     String body() const;
     String tag() const;
+    String image() const;
     String icon() const;
     String badge() const;
     NavigatorVibration::VibrationPattern vibrate() const;
     DOMTimeStamp timestamp() const;
     bool renotify() const;
     bool silent() const;
     bool requireInteraction() const;
     ScriptValue data(ScriptState*);
     Vector<v8::Local<v8::Value>> actions(ScriptState*) const;
 
@@ skipping 57 matching lines @@
     NotificationState m_state;
 
     Member<AsyncMethodRunner<Notification>> m_prepareShowMethodRunner;
 
     Member<NotificationResourcesLoader> m_loader;
 };
 
 } // namespace blink
 
 #endif // Notification_h