Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGStaticStringList.h

Index: Source/core/svg/SVGStaticStringList.h
diff --git a/Source/core/svg/SVGStaticStringList.h b/Source/core/svg/SVGStaticStringList.h
index e007bdee708bbebb0c7f4a6476d21e8a9c9bbb27..4805bf87d65e03bdfbb12bad041955563645b2e6 100644
--- a/Source/core/svg/SVGStaticStringList.h
+++ b/Source/core/svg/SVGStaticStringList.h
@@ -33,6 +33,7 @@
 
 #include "core/svg/SVGStringListTearOff.h"
 #include "core/svg/properties/SVGAnimatedProperty.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
@@ -42,9 +43,9 @@ class SVGElement;
 // Inherits SVGAnimatedPropertyBase to enable XML attribute synchronization, but this is never animated.
 class SVGStaticStringList final : public SVGAnimatedPropertyBase {
 public:
-    static PassRefPtr<SVGStaticStringList> create(SVGElement* contextElement, const QualifiedName& attributeName)
+    static PassRefPtrWillBeRawPtr<SVGStaticStringList> create(SVGElement* contextElement, const QualifiedName& attributeName)
     {
-        return adoptRef(new SVGStaticStringList(contextElement, attributeName));
+        return adoptRefWillBeNoop(new SVGStaticStringList(contextElement, attributeName));
     }
 
     virtual ~SVGStaticStringList();
@@ -52,8 +53,8 @@ public:
     // SVGAnimatedPropertyBase:
     virtual SVGPropertyBase* currentValueBase() override;
     virtual bool isAnimating() const override;
-    virtual PassRefPtr<SVGPropertyBase> createAnimatedValue() override;
-    virtual void setAnimatedValue(PassRefPtr<SVGPropertyBase>) override;
+    virtual PassRefPtrWillBeRawPtr<SVGPropertyBase> createAnimatedValue() override;
+    virtual void setAnimatedValue(PassRefPtrWillBeRawPtr<SVGPropertyBase>) override;
     virtual void animationEnded() override;
     virtual bool needsSynchronizeAttribute() override;
 
@@ -62,11 +63,13 @@ public:
     SVGStringList* value() { return m_value.get(); }
     SVGStringListTearOff* tearOff();
 
+    virtual void trace(Visitor*) override;
+
 private:
     SVGStaticStringList(SVGElement*, const QualifiedName&);
 
-    RefPtr<SVGStringList> m_value;
-    RefPtr<SVGStringListTearOff> m_tearOff;
+    RefPtrWillBeMember<SVGStringList> m_value;
+    RefPtrWillBeMember<SVGStringListTearOff> m_tearOff;
 };
 
 }