Remove PlatformEvent

sky/engine/core/rendering/RenderLayerScrollableArea.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 30 matching lines @@
  * version of this file under any of the LGPL, the MPL or the GPL.
  */
 
 #ifndef SKY_ENGINE_CORE_RENDERING_RENDERLAYERSCROLLABLEAREA_H_
 #define SKY_ENGINE_CORE_RENDERING_RENDERLAYERSCROLLABLEAREA_H_
 
 #include "sky/engine/platform/scroll/ScrollableArea.h"
 
 namespace blink {
 
-class PlatformEvent;
 class RenderBox;
 class RenderLayer;
 
 class RenderLayerScrollableArea final : public ScrollableArea {
 public:
     // FIXME: We should pass in the RenderBox but this opens a window
     // for crashers during RenderLayer setup (see crbug.com/368062).
     RenderLayerScrollableArea(RenderLayer&);
     virtual ~RenderLayerScrollableArea();
 
@@ skipping 124 matching lines @@
     IntPoint m_cachedOverlayScrollbarOffset;
 
     // For areas with overflow, we have a pair of scrollbars.
     RefPtr<Scrollbar> m_hBar;
     RefPtr<Scrollbar> m_vBar;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_RENDERING_RENDERLAYERSCROLLABLEAREA_H_