Make DOMWindowProperty a thin wrapper of ContextLifecycleObserver

third_party/WebKit/Source/modules/screen_orientation/ScreenOrientationControllerImpl.h

 // 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.
 
 #ifndef ScreenOrientationControllerImpl_h
 #define ScreenOrientationControllerImpl_h
 
 #include "core/frame/DOMWindowProperty.h"
 #include "core/frame/PlatformEventController.h"
 #include "core/frame/ScreenOrientationController.h"
@@ skipping 40 matching lines @@
   static WebScreenOrientationType computeOrientation(const IntRect&, uint16_t);
 
   // Inherited from PlatformEventController.
   void didUpdateData() override;
   void registerWithDispatcher() override;
   void unregisterWithDispatcher() override;
   bool hasLastData() override;
   void pageVisibilityChanged() override;
 
   // Inherited from DOMWindowProperty.
-  void frameDestroyed() override;
+  void contextDestroyed() override;
 
   void notifyDispatcher();
 
   void updateOrientation();
 
   void dispatchEventTimerFired(TimerBase*);
 
   bool isActiveAndVisible() const;
 
   Member<ScreenOrientation> m_orientation;
   WebScreenOrientationClient* m_client;
   Timer<ScreenOrientationControllerImpl> m_dispatchEventTimer;
   bool m_activeLock = false;
 };
 
 }  // namespace blink
 
 #endif  // ScreenOrientationControllerImpl_h