Walk render tree instead of render layers for paint.

sky/engine/core/rendering/InlineFlowBox.h

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 97 matching lines @@
     virtual void adjustPosition(float dx, float dy) override;
 
     virtual void extractLineBoxFromRenderObject();
     virtual void attachLineBoxToRenderObject();
     virtual void removeLineBoxFromRenderObject();
 
     virtual void clearTruncation() override;
 
     IntRect roundedFrameRect() const;
 
-    virtual void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) override;
+    virtual void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom, Vector<RenderBox*> layers) override;
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) override;
 
     bool boxShadowCanBeAppliedToBackground(const FillLayer&) const;
 
     virtual RenderLineBoxList* rendererLineBoxes() const;
 
     // logicalLeft = left in a horizontal line and top in a vertical line.
     LayoutUnit marginBorderPaddingLogicalLeft() const { return marginLogicalLeft() + borderLogicalLeft() + paddingLogicalLeft(); }
     LayoutUnit marginBorderPaddingLogicalRight() const { return marginLogicalRight() + borderLogicalRight() + paddingLogicalRight(); }
     LayoutUnit marginLogicalLeft() const
@@ skipping 235 matching lines @@
 }
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::InlineFlowBox*);
 #endif
 
 #endif  // SKY_ENGINE_CORE_RENDERING_INLINEFLOWBOX_H_