More cleanup of dead code now that we don't have frame-level scrolling.

sky/engine/core/rendering/compositing/RenderLayerCompositor.h

 /*
  * Copyright (C) 2009 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 118 matching lines @@
     RootLayerAttachment rootLayerAttachment() const { return m_rootLayerAttachment; }
     void updateRootLayerAttachment();
     void updateRootLayerPosition();
 
     void setIsInWindow(bool);
 
     // Update the geometry of the layers used for clipping and scrolling in frames.
     void frameViewDidChangeLocation(const IntPoint& contentsOffset);
     void frameViewDidChangeSize();
     void frameViewDidScroll();
-    void frameViewScrollbarsExistenceDidChange();
     void rootFixedBackgroundsChanged();
 
     bool scrollingLayerDidChange(RenderLayer*);
 
     String layerTreeAsText(LayerTreeFlags);
 
     GraphicsLayer* layerForHorizontalScrollbar() const { return m_layerForHorizontalScrollbar.get(); }
     GraphicsLayer* layerForVerticalScrollbar() const { return m_layerForVerticalScrollbar.get(); }
     GraphicsLayer* layerForScrollCorner() const { return m_layerForScrollCorner.get(); }
 
@@ skipping 81 matching lines @@
 
     // Layers for overflow controls
     OwnPtr<GraphicsLayer> m_layerForHorizontalScrollbar;
     OwnPtr<GraphicsLayer> m_layerForVerticalScrollbar;
     OwnPtr<GraphicsLayer> m_layerForScrollCorner;
 };
 
 } // namespace blink
 
 #endif // RenderLayerCompositor_h