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

Source/core/rendering/RenderQuote.h

Index: Source/core/rendering/RenderQuote.h
diff --git a/Source/core/rendering/RenderQuote.h b/Source/core/rendering/RenderQuote.h
index 431d967160b39719b19494a6ae495e406f7ff1bf..a7e4b08a45c99df29ff72b2161d1a5a7974bb020 100644
--- a/Source/core/rendering/RenderQuote.h
+++ b/Source/core/rendering/RenderQuote.h
@@ -35,6 +35,7 @@ class RenderQuote FINAL : public RenderInline {
 public:
     RenderQuote(Document*, const QuoteType);
     virtual ~RenderQuote();
+    virtual void trace(Visitor*) OVERRIDE;
     void attachQuote();
 
 private:
@@ -54,8 +55,8 @@ private:
 
     QuoteType m_type;
     int m_depth;
-    RenderQuote* m_next;
-    RenderQuote* m_previous;
+    RawPtrWillBeMember<RenderQuote> m_next;
+    RawPtrWillBeMember<RenderQuote> m_previous;
     bool m_attached;
     String m_text;
 };