Delete an assortment of unneeded paint invalidation code.

sky/engine/core/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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>
@@ skipping 110 matching lines @@
     void updateLayerPositionsAfterLayout();
 
     void updateTransformationMatrix();
     RenderLayer* renderingContextRoot();
 
     // Our current relative position offset.
     const LayoutSize offsetForInFlowPosition() const;
 
     void addBlockSelectionGapsBounds(const LayoutRect&);
     void clearBlockSelectionGapsBounds();
-    void invalidatePaintForBlockSelectionGaps();
     IntRect blockSelectionGapsBounds() const;
 
     RenderLayerStackingNode* stackingNode() { return m_stackingNode.get(); }
     const RenderLayerStackingNode* stackingNode() const { return m_stackingNode.get(); }
 
     bool hasBoxDecorationsOrBackground() const;
     bool hasVisibleBoxDecorations() const;
     // Returns true if this layer has visible content (ignoring any child layers).
     bool isVisuallyNonEmpty() const;
     // True if this layer container renderers that paint.
@@ skipping 418 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const blink::RenderLayer*);
 void showLayerTree(const blink::RenderObject*);
 #endif
 
 #endif  // SKY_ENGINE_CORE_RENDERING_RENDERLAYER_H_