Removed ScrollingCoordinator and a bunch of composited scrolling'

sky/engine/platform/scroll/ScrollableArea.h

 /*
  * Copyright (C) 2008, 2011 Apple 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
@@ skipping 173 matching lines @@
         else
             m_verticalBarDamage.unite(rect);
     }
 
     void resetScrollbarDamage()
     {
         m_verticalBarDamage = IntRect();
         m_horizontalBarDamage = IntRect();
     }
 
-    GraphicsLayer* layerForContainer() const;
-    virtual GraphicsLayer* layerForScrolling() const = 0;
-    virtual GraphicsLayer* layerForHorizontalScrollbar() const = 0;
-    virtual GraphicsLayer* layerForVerticalScrollbar() const = 0;
-    bool hasLayerForHorizontalScrollbar() const;
-    bool hasLayerForVerticalScrollbar() const;
-
     void cancelProgrammaticScrollAnimation();
 
 protected:
     ScrollableArea();
     virtual ~ScrollableArea();
 
     void setScrollOrigin(const IntPoint&);
     void resetScrollOriginChanged() { m_scrollOriginChanged = false; }
 
     virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) = 0;
@@ skipping 45 matching lines @@
     // vertical-lr / ltr            NO                      NO
     // vertical-lr / rtl            NO                      YES
     // vertical-rl / ltr            YES                     NO
     // vertical-rl / rtl            YES                     YES
     IntPoint m_scrollOrigin;
 };
 
 } // namespace blink
 
 #endif // ScrollableArea_h