Remove codes related to scaling in GraphicsLayer tree.

Source/core/rendering/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 186 matching lines @@
     void frameViewDidChangeLocation(const IntPoint& contentsOffset);
     void frameViewDidChangeSize();
     void frameViewDidScroll();
     void frameViewDidLayout();
     void rootFixedBackgroundsChanged();
 
     void scrollingLayerDidChange(RenderLayer*);
 
     String layerTreeAsText(LayerTreeFlags);
 
-    virtual float deviceScaleFactor() const OVERRIDE;
-    virtual float pageScaleFactor() const OVERRIDE;
     virtual void didCommitChangesForLayer(const GraphicsLayer*) const OVERRIDE;
 
-    bool keepLayersPixelAligned() const;
-
-    void deviceOrPageScaleFactorChanged();
-
     GraphicsLayer* layerForHorizontalScrollbar() const { return m_layerForHorizontalScrollbar.get(); }
     GraphicsLayer* layerForVerticalScrollbar() const { return m_layerForVerticalScrollbar.get(); }
     GraphicsLayer* layerForScrollCorner() const { return m_layerForScrollCorner.get(); }
 #if ENABLE(RUBBER_BANDING)
     GraphicsLayer* layerForOverhangAreas() const { return m_layerForOverhangAreas.get(); }
 
     GraphicsLayer* updateLayerForTopOverhangArea(bool wantsLayer);
     GraphicsLayer* updateLayerForBottomOverhangArea(bool wantsLayer);
 #endif
 
@@ skipping 157 matching lines @@
     int m_secondaryCompositedLayerCount; // count of layers that have to be composited because of stacking or overlap.
     double m_obligatoryBackingStoreBytes;
     double m_secondaryBackingStoreBytes;
 #endif
 };
 
 
 } // namespace WebCore
 
 #endif // RenderLayerCompositor_h