Remove the HasOwnBackingButPaintsIntoAncestor compositing state.

Source/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 286 matching lines @@
     // FIXME: This is identical to null checking compositedLayerMapping(), why not just call that?
     bool hasCompositedLayerMapping() const { return m_compositedLayerMapping.get(); }
     void clearCompositedLayerMapping(bool layerBeingDestroyed = false);
     CompositedLayerMapping* groupedMapping() const { return m_groupedMapping; }
     void setGroupedMapping(CompositedLayerMapping* groupedMapping, bool layerBeingDestroyed = false);
 
     bool hasCompositedMask() const;
     bool hasCompositedClippingMask() const;
     bool needsCompositedScrolling() const { return m_scrollableArea && m_scrollableArea->needsCompositedScrolling(); }
 
-    bool clipsCompositingDescendantsWithBorderRadius() const;
-
     // Computes the position of the given render object in the space of |paintInvalidationContainer|.
     // FIXME: invert the logic to have paint invalidation containers take care of painting objects into them, rather than the reverse.
     // This will allow us to clean up this static method messiness.
     static LayoutPoint positionFromPaintInvalidationBacking(const RenderObject*, const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0);
 
     static void mapPointToPaintBackingCoordinates(const RenderLayerModelObject* paintInvalidationContainer, FloatPoint&);
     static void mapRectToPaintBackingCoordinates(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect&);
 
     // Adjusts the given rect (in the coordinate space of the RenderObject) to the coordinate space of |paintInvalidationContainer|'s GraphicsLayer backing.
     static void mapRectToPaintInvalidationBacking(const RenderObject*, const RenderLayerModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState* = 0);
@@ skipping 373 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 // RenderLayer_h