Oilpan: move RenderObjects off heap.

Source/core/rendering/RenderObjectChildList.cpp

 /*
  * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 18 matching lines @@
 
 #include "core/dom/AXObjectCache.h"
 #include "core/layout/LayoutCounter.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/style/RenderStyle.h"
 
 namespace blink {
 
-void RenderObjectChildList::trace(Visitor* visitor)
-{
-    visitor->trace(m_firstChild);
-    visitor->trace(m_lastChild);
-}
-
 void RenderObjectChildList::destroyLeftoverChildren()
 {
     while (firstChild()) {
         // List markers are owned by their enclosing list and so don't get destroyed by this container.
         if (firstChild()->isListMarker()) {
             firstChild()->remove();
             continue;
         }
 
         // Destroy any anonymous children remaining in the render tree, as well as implicit (shadow) DOM elements like those used in the engine-based text fields.
@@ skipping 125 matching lines @@
         return;
     if (oldChild.isBody()) {
         oldChild.view()->setShouldDoFullPaintInvalidation();
         return;
     }
     DisableCompositingQueryAsserts disabler;
     oldChild.invalidatePaintUsingContainer(oldChild.containerForPaintInvalidation(), oldChild.previousPaintInvalidationRect(), PaintInvalidationRendererRemoval);
 }
 
 } // namespace blink