Oilpan: Change Persistent<> data members to Member<> in HitTestResult.

Source/core/rendering/HitTestResult.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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 29 matching lines @@
 class LocalFrame;
 class HTMLMediaElement;
 class Image;
 class KURL;
 class Node;
 class RenderObject;
 class PositionWithAffinity;
 class Scrollbar;
 
 class HitTestResult {
+    DISALLOW_ALLOCATION();
 public:
     typedef WillBeHeapListHashSet<RefPtrWillBeMember<Node> > NodeSet;
 
     HitTestResult();
     HitTestResult(const LayoutPoint&);
     // Pass non-negative padding values to perform a rect-based hit test.
     HitTestResult(const LayoutPoint& centerPoint, unsigned topPadding, unsigned rightPadding, unsigned bottomPadding, unsigned leftPadding);
     HitTestResult(const HitTestLocation&);
     HitTestResult(const HitTestResult&);
     ~HitTestResult();
     HitTestResult& operator=(const HitTestResult&);
+    void trace(Visitor*);
 
     Node* innerNode() const { return m_innerNode.get(); }
     Node* innerPossiblyPseudoNode() const { return m_innerPossiblyPseudoNode.get(); }
     Element* innerElement() const;
     Node* innerNonSharedNode() const { return m_innerNonSharedNode.get(); }
     Element* URLElement() const { return m_innerURLElement.get(); }
     Scrollbar* scrollbar() const { return m_scrollbar.get(); }
     bool isOverWidget() const { return m_isOverWidget; }
 
     // Forwarded from HitTestLocation
@@ skipping 57 matching lines @@
 
     // FIXME: Remove this.
     Node* targetNode() const { return innerNode(); }
 
 private:
     NodeSet& mutableRectBasedTestResult(); // See above.
     HTMLMediaElement* mediaElement() const;
 
     HitTestLocation m_hitTestLocation;
 
-    RefPtrWillBePersistent<Node> m_innerNode;
-    RefPtrWillBePersistent<Node> m_innerPossiblyPseudoNode;
-    RefPtrWillBePersistent<Node> m_innerNonSharedNode;
+    RefPtrWillBeMember<Node> m_innerNode;
+    RefPtrWillBeMember<Node> m_innerPossiblyPseudoNode;
+    RefPtrWillBeMember<Node> m_innerNonSharedNode;
     // FIXME: Nothing changes this to a value different from m_hitTestLocation!
     LayoutPoint m_pointInInnerNodeFrame; // The hit-tested point in innerNode frame coordinates.
     LayoutPoint m_localPoint; // A point in the local coordinate space of m_innerNonSharedNode's renderer. Allows us to efficiently
                               // determine where inside the renderer we hit on subsequent operations.
-    RefPtrWillBePersistent<Element> m_innerURLElement;
+    RefPtrWillBeMember<Element> m_innerURLElement;
     RefPtr<Scrollbar> m_scrollbar;
     bool m_isOverWidget; // Returns true if we are over a widget (and not in the border/padding area of a RenderWidget for example).
     bool m_isFirstLetter;
 
-    mutable OwnPtrWillBePersistent<NodeSet> m_rectBasedTestResult;
+    mutable OwnPtrWillBeMember<NodeSet> m_rectBasedTestResult;
 };
 
 } // namespace blink
 
 #endif // HitTestResult_h