Delete blink code for scroll-blocks-on

Source/core/layout/compositing/CompositedDeprecatedPaintLayerMapping.h

 /*
  * Copyright (C) 2009, 2010, 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 245 matching lines @@
 
     GraphicsLayerPaintingPhase paintingPhaseForPrimaryLayer() const;
 
     // Result is transform origin in pixels.
     FloatPoint3D computeTransformOrigin(const IntRect& borderBox) const;
 
     void updateOpacity(const ComputedStyle&);
     void updateTransform(const ComputedStyle&);
     void updateLayerBlendMode(const ComputedStyle&);
     void updateIsRootForIsolatedGroup();
-    void updateScrollBlocksOn(const ComputedStyle&);
     // Return the opacity value that this layer should use for compositing.
     float compositingOpacity(float layoutObjectOpacity) const;
 
     bool paintsChildren() const;
 
     // Returns true if this layer has content that needs to be displayed by painting into the backing store.
     bool containsPaintedContent() const;
     // Returns true if the Layer just contains an image that we can composite directly.
     bool isDirectlyCompositedImage() const;
     void updateImageContents();
@@ skipping 146 matching lines @@
     unsigned m_pendingUpdateScope : 2;
     unsigned m_isMainFrameLayoutViewLayer : 1;
 
     unsigned m_backgroundLayerPaintsFixedRootBackground : 1;
     unsigned m_scrollingContentsAreEmpty : 1;
 };
 
 } // namespace blink
 
 #endif // CompositedDeprecatedPaintLayerMapping_h