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

Source/core/rendering/HitTestResult.cpp

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * 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 96 matching lines @@
     m_scrollbar = other.scrollbar();
     m_isFirstLetter = other.m_isFirstLetter;
     m_isOverWidget = other.isOverWidget();
 
     // Only copy the NodeSet in case of rect hit test.
     m_rectBasedTestResult = adoptPtrWillBeNoop(other.m_rectBasedTestResult ? new NodeSet(*other.m_rectBasedTestResult) : 0);
 
     return *this;
 }
 
+void HitTestResult::trace(Visitor* visitor)
+{
+    visitor->trace(m_innerNode);
+    visitor->trace(m_innerPossiblyPseudoNode);
+    visitor->trace(m_innerNonSharedNode);
+    visitor->trace(m_innerURLElement);
+#if ENABLE(OILPAN)
+    visitor->trace(m_rectBasedTestResult);
+#endif
+}
+
 RenderObject* HitTestResult::renderer() const
 {
     if (!m_innerNode)
         return 0;
     RenderObject* renderer = m_innerNode->renderer();
     if (!m_isFirstLetter || !renderer || !renderer->isText() || !toRenderText(renderer)->isTextFragment())
         return renderer;
     return toRenderTextFragment(renderer)->firstRenderTextInFirstLetter();
 }
 
@@ skipping 359 matching lines @@
 {
     for (Node* node = m_innerNode.get(); node; node = NodeRenderingTraversal::parent(node)) {
         if (node->isElementNode())
             return toElement(node);
     }
 
     return 0;
 }
 
 } // namespace WebCore