Remove SVGElementInstance

Source/core/svg/SVGElementRareData.h

 /*
  * Copyright (C) Research In Motion Limited 2010. 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 41 matching lines @@
 
     WillBeHeapHashSet<RawPtrWillBeWeakMember<SVGElement> >& elementInstances() { return m_elementInstances; }
     const WillBeHeapHashSet<RawPtrWillBeWeakMember<SVGElement> >& elementInstances() const { return m_elementInstances; }
 
     bool instanceUpdatesBlocked() const { return m_instancesUpdatesBlocked; }
     void setInstanceUpdatesBlocked(bool value) { m_instancesUpdatesBlocked = value; }
 
     SVGCursorElement* cursorElement() const { return m_cursorElement; }
     void setCursorElement(SVGCursorElement* cursorElement) { m_cursorElement = cursorElement; }
 
-    SVGElement* correspondingElement() { return m_correspondingElement; }
+    SVGElement* correspondingElement() { return m_correspondingElement.get(); }
     void setCorrespondingElement(SVGElement* correspondingElement) { m_correspondingElement = correspondingElement; }
 
     CSSCursorImageValue* cursorImageValue() const { return m_cursorImageValue; }
     void setCursorImageValue(CSSCursorImageValue* cursorImageValue) { m_cursorImageValue = cursorImageValue; }
 
     MutableStylePropertySet* animatedSMILStyleProperties() const { return m_animatedSMILStyleProperties.get(); }
     MutableStylePropertySet* ensureAnimatedSMILStyleProperties()
     {
         if (!m_animatedSMILStyleProperties)
             m_animatedSMILStyleProperties = MutableStylePropertySet::create(SVGAttributeMode);
@@ skipping 50 matching lines @@
 #endif
     }
 
 private:
 #if ENABLE(OILPAN)
     Member<SVGElement> m_owner;
 #endif
     WillBeHeapHashSet<RawPtrWillBeWeakMember<SVGElement> > m_elementInstances;
     RawPtrWillBeWeakMember<SVGCursorElement> m_cursorElement;
     RawPtrWillBeWeakMember<CSSCursorImageValue> m_cursorImageValue;
-    RawPtrWillBeMember<SVGElement> m_correspondingElement;
+    RefPtrWillBeMember<SVGElement> m_correspondingElement;
     bool m_instancesUpdatesBlocked : 1;
     bool m_useOverrideComputedStyle : 1;
     bool m_needsOverrideComputedStyleUpdate : 1;
     RefPtrWillBeMember<MutableStylePropertySet> m_animatedSMILStyleProperties;
     RefPtr<RenderStyle> m_overrideComputedStyle;
 };
 
 }
 
 #endif