Oilpan: Replace RefPtrs and raw pointers to Node and its subclasses in core/frame and core/page wit…

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index 5028dc5ea43c90f85042b77415a7344158c76ec2..9c287a5798e3bc3910bd361a4b8064ccc14a7289 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -472,7 +472,7 @@ private:
     bool m_isTrackingRepaints; // Used for testing.
     Vector<IntRect> m_trackedRepaintRects;
 
-    RefPtr<Node> m_nodeToDraw;
+    RefPtrWillBePersistent<Node> m_nodeToDraw;
     PaintBehavior m_paintBehavior;
     bool m_isPainting;
 
@@ -481,7 +481,7 @@ private:
     bool m_isVisuallyNonEmpty;
     bool m_firstVisuallyNonEmptyLayoutCallbackPending;
 
-    RefPtr<Node> m_maintainScrollPositionAnchor;
+    RefPtrWillBePersistent<Node> m_maintainScrollPositionAnchor;
 
     // Renderer to hold our custom scroll corner.
     RenderScrollbarPart* m_scrollCorner;