Delete most of rendering/compositing.

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 109 matching lines @@
     void paintOverflowControls(GraphicsContext*, const IntPoint& paintOffset, const IntRect& damageRect, bool paintingOverlayControls);
     void positionOverflowControls(const IntSize& offsetFromRoot);
 
     LayoutRect exposeRect(const LayoutRect&, const ScrollAlignment& alignX, const ScrollAlignment& alignY);
 
     // Returns true our scrollable area is in the FrameView's collection of scrollable areas. This can
     // only happen if we're both scrollable, and we do in fact overflow. This means that overflow: hidden
     // layers never get added to the FrameView's collection.
     bool scrollsOverflow() const { return m_scrollsOverflow; }
 
-    void updateNeedsCompositedScrolling();
+    // FIXME(sky): Remove
     bool needsCompositedScrolling() const { return m_needsCompositedScrolling; }
 
     // These are used during compositing updates to determine if the overflow
     // controls need to be repositioned in the GraphicsLayer tree.
     void setTopmostScrollChild(RenderLayer*);
     RenderLayer* topmostScrollChild() const { ASSERT(!m_nextTopmostScrollChild); return m_topmostScrollChild; }
 
 private:
     bool hasHorizontalOverflow() const;
     bool hasVerticalOverflow() const;
@@ skipping 18 matching lines @@
     void setHasHorizontalScrollbar(bool hasScrollbar);
     void setHasVerticalScrollbar(bool hasScrollbar);
 
     bool overflowControlsIntersectRect(const IntRect& localRect) const;
 
     RenderBox& box() const;
     RenderLayer* layer() const;
 
     void updateScrollableAreaSet(bool hasOverflow);
 
-    void updateCompositingLayersAfterScroll();
-
     RenderLayer& m_layer;
 
     unsigned m_scrollsOverflow : 1;
 
     unsigned m_scrollDimensionsDirty : 1;
     unsigned m_inOverflowRelayout : 1;
 
     RenderLayer* m_nextTopmostScrollChild;
     RenderLayer* m_topmostScrollChild;
 
@@ skipping 10 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_