Remove painting roots.

sky/engine/core/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
  * License as published by the Free Software Foundation; either
@@ skipping 461 matching lines @@
     bool pushedClip = pushContentsClip(paintInfo, adjustedPaintOffset, contentsClipBehavior);
     {
         paintObject(paintInfo, adjustedPaintOffset);
     }
     if (pushedClip)
         popContentsClip(paintInfo, phase, adjustedPaintOffset);
 }
 
 void RenderBlock::paintContents(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
-    // We don't paint our own background, but we do let the kids paint their backgrounds.
-    PaintInfo paintInfoForChild(paintInfo);
-    paintInfoForChild.updatePaintingRootForChildren(this);
-    paintChildren(paintInfoForChild, paintOffset);
+    // FIXME(sky): Can we remove paintContents and just keep paintChildren?
+    paintChildren(paintInfo, paintOffset);
 }
 
 void RenderBlock::paintChildren(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox())
         paintChild(child, paintInfo, paintOffset);
 }
 
 void RenderBlock::paintChild(RenderBox* child, PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
@@ skipping 1327 matching lines @@
 void RenderBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const RenderObject* obj) const
 {
     showRenderObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink