ScreenOrientationController: task-based dispatching of change events.

Source/modules/screen_orientation/ScreenOrientationController.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 ScreenOrientationController_h
 #define ScreenOrientationController_h
 
 #include "core/frame/LocalFrameLifecycleObserver.h"
 #include "core/frame/PlatformEventController.h"
 #include "platform/Supplementable.h"
-#include "platform/Timer.h"
 #include "public/platform/WebLockOrientationCallback.h"
 #include "public/platform/WebScreenOrientationLockType.h"
 #include "public/platform/WebScreenOrientationType.h"
 
 namespace blink {
 
 class FrameView;
 class ScreenOrientation;
 class WebScreenOrientationClient;
 
@@ skipping 31 matching lines @@
     virtual bool hasLastData() override;
     virtual void pageVisibilityChanged() override;
 
     // Inherited from LocalFrameLifecycleObserver.
     virtual void willDetachFrameHost() override;
 
     void notifyDispatcher();
 
     void updateOrientation();
 
-    void dispatchEventTimerFired(Timer<ScreenOrientationController>*);
+    void dispatchChangeEvent();
 
     bool isActiveAndVisible() const;
 
     PersistentWillBeMember<ScreenOrientation> m_orientation;
     WebScreenOrientationClient* m_client;
-    Timer<ScreenOrientationController> m_dispatchEventTimer;
+    bool m_isDispatchingEvent;
 };
 
 } // namespace blink
 
 #endif // ScreenOrientationController_h