SVG: Move/rename reference management to SVGElement

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 32 matching lines @@
         : m_cursorElement(nullptr)
 #endif
         , m_cursorImageValue(nullptr)
         , m_correspondingElement(nullptr)
         , m_instancesUpdatesBlocked(false)
         , m_useOverrideComputedStyle(false)
         , m_needsOverrideComputedStyleUpdate(false)
     {
     }
 
-    WillBeHeapHashSet<RawPtrWillBeMember<SVGElement> >& referencingElements() { return m_referencingElements; }
-    const WillBeHeapHashSet<RawPtrWillBeMember<SVGElement> >& referencingElements() const { return m_referencingElements; }
-    WillBeHeapHashSet<RawPtrWillBeMember<SVGElement> >& referencedElements() { return m_referencedElements; }
-    const WillBeHeapHashSet<RawPtrWillBeMember<SVGElement> >& referencedElements() const { return m_referencedElements; }
+    SVGElementSet& outgoingReferences() { return m_outgoingReferences; }
+    const SVGElementSet& outgoingReferences() const { return m_outgoingReferences; }
+    SVGElementSet& incomingReferences() { return m_incomingReferences; }
+    const SVGElementSet& incomingReferences() const { return m_incomingReferences; }
 
     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; }
 
@@ skipping 12 matching lines @@
     void setUseOverrideComputedStyle(bool value) { m_useOverrideComputedStyle = value; }
     void setNeedsOverrideComputedStyleUpdate() { m_needsOverrideComputedStyleUpdate = true; }
 
     void trace(Visitor*);
     void processWeakMembers(Visitor*);
 
 private:
 #if ENABLE(OILPAN)
     Member<SVGElement> m_owner;
 #endif
-    WillBeHeapHashSet<RawPtrWillBeMember<SVGElement> > m_referencingElements;
-    WillBeHeapHashSet<RawPtrWillBeMember<SVGElement> > m_referencedElements;
+    SVGElementSet m_outgoingReferences;
+    SVGElementSet m_incomingReferences;
     WillBeHeapHashSet<RawPtrWillBeWeakMember<SVGElement> > m_elementInstances;
     RawPtrWillBeWeakMember<SVGCursorElement> m_cursorElement;
     RawPtrWillBeWeakMember<CSSCursorImageValue> m_cursorImageValue;
     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