Revert of Notify the browser when the page lost interest about gamepads

Source/core/frame/DeviceEventControllerBase.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 DeviceEventControllerBase_h
 #define DeviceEventControllerBase_h
 
 #include "core/page/PageLifecycleObserver.h"
 #include "platform/Timer.h"
 
@@ skipping 18 matching lines @@
     virtual void registerWithDispatcher() = 0;
     virtual void unregisterWithDispatcher() = 0;
 
     // When true initiates a one-shot didUpdateData() when startUpdating() is called.
     virtual bool hasLastData() = 0;
 
     bool m_hasEventListener;
 
 private:
     // Inherited from PageLifecycleObserver.
-    virtual void pageVisibilityChanged() OVERRIDE;
+    virtual void pageVisibilityChanged() OVERRIDE FINAL;
 
     void oneShotCallback(Timer<DeviceEventControllerBase>*);
 
     bool m_isActive;
     Timer<DeviceEventControllerBase> m_timer;
 };
 
 } // namespace WebCore
 
 #endif // DeviceEventControllerBase_h