Deduplicate DeviceEvent* classes

Source/core/frame/DeviceSensorEventController.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:
- *
- * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- * 2.  Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef DeviceSensorEventController_h
-#define DeviceSensorEventController_h
-
-#include "core/events/Event.h"
-#include "core/page/PageLifecycleObserver.h"
-#include "platform/Timer.h"
-
-namespace WebCore {
-
-class Document;
-
-class DeviceSensorEventController : public PageLifecycleObserver {
-
-public:
-    void startUpdating();
-    void stopUpdating();
-
-protected:
-    explicit DeviceSensorEventController(Page*);
-    virtual ~DeviceSensorEventController();
-
-    void dispatchDeviceEvent(const PassRefPtrWillBeRawPtr<Event>);
-
-    virtual bool hasLastData() = 0;
-    virtual PassRefPtrWillBeRawPtr<Event> getLastEvent() = 0;
-    virtual void registerWithDispatcher() = 0;
-    virtual void unregisterWithDispatcher() = 0;
-    virtual bool isNullEvent(Event*) = 0;
-    virtual Document* document() = 0;
-
-    bool m_hasEventListener;
-
-private:
-    // Inherited from PageLifecycleObserver.
-    virtual void pageVisibilityChanged() OVERRIDE FINAL;
-
-    void fireDeviceEvent(Timer<DeviceSensorEventController>*);
-
-    bool m_isActive;
-    bool m_needsCheckingNullEvents;
-    Timer<DeviceSensorEventController> m_timer;
-};
-
-} // namespace WebCore
-
-#endif // DeviceSensorEventController_h