Oilpan: Prepare to move RenderObject and RenderObjectChildList to Oilpan heap.

Source/core/rendering/RenderWidget.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2009, 2010 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,
@@ skipping 20 matching lines @@
 public:
     virtual ~RenderWidget();
 
     Widget* widget() const;
 
     void updateOnWidgetChange();
     void updateWidgetPosition();
     void widgetPositionsUpdated();
 
     void setIsOverlapped(bool);
-
+#if !ENABLE(OILPAN)
     void ref() { ++m_refCount; }
     void deref();
-
+#endif
     virtual bool isWidget() const OVERRIDE FINAL { return true; }
     bool updateWidgetGeometry();
 
 protected:
     explicit RenderWidget(Element*);
 
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE FINAL;
     virtual void layout() OVERRIDE;
     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;
     virtual CursorDirective getCursor(const LayoutPoint&, Cursor&) const OVERRIDE FINAL;
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;
 
     virtual void paintContents(PaintInfo&, const LayoutPoint&);
 
 private:
     virtual void willBeDestroyed() OVERRIDE FINAL;
     virtual void destroy() OVERRIDE FINAL;
 
     bool setWidgetGeometry(const LayoutRect&);
-
+#if !ENABLE(OILPAN)
     int m_refCount;
+#endif
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderWidget, isWidget());
 
 } // namespace blink
 
 #endif // RenderWidget_h