Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGAnimatedNumber.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef SVGAnimatedNumber_h
 #define SVGAnimatedNumber_h
 
 #include "core/svg/SVGNumberTearOff.h"
 #include "core/svg/properties/SVGAnimatedProperty.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
 class SVGAnimatedNumberOptionalNumber;
 
 // SVG Spec: http://www.w3.org/TR/SVG11/types.html#InterfaceSVGAnimatedNumber
 class SVGAnimatedNumber : public SVGAnimatedProperty<SVGNumber> {
 public:
-    static PassRefPtr<SVGAnimatedNumber> create(SVGElement* contextElement, const QualifiedName& attributeName, PassRefPtr<SVGNumber> initialValue)
+    static PassRefPtrWillBeRawPtr<SVGAnimatedNumber> create(SVGElement* contextElement, const QualifiedName& attributeName, PassRefPtrWillBeRawPtr<SVGNumber> initialValue)
     {
-        return adoptRef(new SVGAnimatedNumber(contextElement, attributeName, initialValue));
+        return adoptRefWillBeNoop(new SVGAnimatedNumber(contextElement, attributeName, initialValue));
     }
 
     virtual void synchronizeAttribute() override;
 
     void setParentOptionalNumber(SVGAnimatedNumberOptionalNumber* numberOptionalNumber)
     {
         m_parentNumberOptionalNumber = numberOptionalNumber;
     }
 
+    virtual void trace(Visitor*) override;
+
 protected:
-    SVGAnimatedNumber(SVGElement* contextElement, const QualifiedName& attributeName, PassRefPtr<SVGNumber> initialValue)
+    SVGAnimatedNumber(SVGElement* contextElement, const QualifiedName& attributeName, PassRefPtrWillBeRawPtr<SVGNumber> initialValue)
         : SVGAnimatedProperty<SVGNumber>(contextElement, attributeName, initialValue)
-        , m_parentNumberOptionalNumber(0)
+        , m_parentNumberOptionalNumber(nullptr)
     {
     }
 
-    // FIXME: oilpan: This is kept as raw ptr as this is a back ptr. Change this to Member<> in oilpan.
-    SVGAnimatedNumberOptionalNumber* m_parentNumberOptionalNumber;
+    RawPtrWillBeMember<SVGAnimatedNumberOptionalNumber> m_parentNumberOptionalNumber;
 };
 
 } // namespace blink
 
 #endif // SVGAnimatedNumber_h