Remove UnusedParam.h

Source/platform/scroll/ScrollAnimator.h

 /*
  * Copyright (c) 2010, 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 20 matching lines @@
 #ifndef ScrollAnimator_h
 #define ScrollAnimator_h
 
 #include "platform/PlatformExport.h"
 #include "platform/PlatformWheelEvent.h"
 #include "platform/geometry/FloatSize.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "wtf/FastAllocBase.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
-#include "wtf/UnusedParam.h"
 
 namespace WebCore {
 
 class FloatPoint;
 class ScrollableArea;
 class Scrollbar;
 
 class PLATFORM_EXPORT ScrollAnimator {
     WTF_MAKE_FAST_ALLOCATED; WTF_MAKE_NONCOPYABLE(ScrollAnimator);
 public:
@@ skipping 39 matching lines @@
 
     virtual void finishCurrentScrollAnimations() { }
 
     virtual void didAddVerticalScrollbar(Scrollbar*) { }
     virtual void willRemoveVerticalScrollbar(Scrollbar*) { }
     virtual void didAddHorizontalScrollbar(Scrollbar*) { }
     virtual void willRemoveHorizontalScrollbar(Scrollbar*) { }
 
     virtual bool shouldScrollbarParticipateInHitTesting(Scrollbar*) { return true; }
 
-    virtual void notifyContentAreaScrolled(const FloatSize& delta) { UNUSED_PARAM(delta); }
+    virtual void notifyContentAreaScrolled(const FloatSize&) { }
 
     virtual bool isRubberBandInProgress() const { return false; }
 
 protected:
     explicit ScrollAnimator(ScrollableArea*);
 
     virtual void notifyPositionChanged(const FloatSize& delta);
 
     ScrollableArea* m_scrollableArea;
     float m_currentPosX; // We avoid using a FloatPoint in order to reduce
     float m_currentPosY; // subclass code complexity.
 
 private:
     float clampScrollPosition(ScrollbarOrientation, float);
 };
 
 } // namespace WebCore
 
 #endif // ScrollAnimator_h