Remove painting roots.

sky/engine/core/rendering/RenderObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 488 matching lines @@
 
     IntRect absoluteBoundingBoxRect() const;
 
     // Build an array of quads in absolute coords for line boxes
     virtual void absoluteQuads(Vector<FloatQuad>&) const { }
 
     virtual void absoluteFocusRingQuads(Vector<FloatQuad>&);
 
     static FloatRect absoluteBoundingBoxRectForRange(const Range*);
 
-    // the rect that will be painted if this object is passed as the paintingRoot
-    LayoutRect paintingRootRect(LayoutRect& topLevelRect);
-
     virtual LayoutUnit minPreferredLogicalWidth() const { return 0; }
     virtual LayoutUnit maxPreferredLogicalWidth() const { return 0; }
 
     RenderStyle* style() const { return m_style.get(); }
 
     /* The two following methods are inlined in RenderObjectInlines.h */
     RenderStyle* firstLineStyle() const;
     RenderStyle* style(bool firstLine) const;
 
     inline Color resolveColor(const RenderStyle* styleToUse, int colorProperty) const
@@ skipping 399 matching lines @@
 void showTree(const blink::RenderObject*);
 void showLineTree(const blink::RenderObject*);
 void showRenderTree(const blink::RenderObject* object1);
 // We don't make object2 an optional parameter so that showRenderTree
 // can be called from gdb easily.
 void showRenderTree(const blink::RenderObject* object1, const blink::RenderObject* object2);
 
 #endif
 
 #endif  // SKY_ENGINE_CORE_RENDERING_RENDEROBJECT_H_