Walk render tree instead of render layers for paint.

sky/engine/core/rendering/RenderFlexibleBox.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 240 matching lines @@
 }
 
 void RenderFlexibleBox::appendChildFrameRects(ChildFrameRects& childFrameRects)
 {
     for (RenderBox* child = m_orderIterator.first(); child; child = m_orderIterator.next()) {
         if (!child->isOutOfFlowPositioned())
             childFrameRects.append(child->frameRect());
     }
 }
 
-void RenderFlexibleBox::paintChildren(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
+void RenderFlexibleBox::paintChildren(PaintInfo& paintInfo, const LayoutPoint& paintOffset, Vector<RenderBox*>& layers)
 {
     for (RenderBox* child = m_orderIterator.first(); child; child = m_orderIterator.next()) {
-        if (!child->hasSelfPaintingLayer())
-            child->paint(paintInfo, paintOffset);
+        if (child->hasSelfPaintingLayer())
+            layers.append(child);
+        else
+            child->paint(paintInfo, paintOffset, layers);
     }
 }
 
 void RenderFlexibleBox::repositionLogicalHeightDependentFlexItems(Vector<LineContext>& lineContexts)
 {
     LayoutUnit crossAxisStartEdge = lineContexts.isEmpty() ? LayoutUnit() : lineContexts[0].crossAxisOffset;
     alignFlexLines(lineContexts);
 
     alignChildren(lineContexts);
 
@@ skipping 1010 matching lines @@
             ASSERT(child);
             LayoutUnit lineCrossAxisExtent = lineContexts[lineNumber].crossAxisExtent;
             LayoutUnit originalOffset = lineContexts[lineNumber].crossAxisOffset - crossAxisStartEdge;
             LayoutUnit newOffset = contentExtent - originalOffset - lineCrossAxisExtent;
             adjustAlignmentForChild(child, newOffset - originalOffset);
         }
     }
 }
 
 }