Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGFilterElement.h

Index: Source/core/svg/SVGFilterElement.h
diff --git a/Source/core/svg/SVGFilterElement.h b/Source/core/svg/SVGFilterElement.h
index 20cd84f83b590da2c952eb1a854df4a6156e5e22..9747fdedee7dfe2c6c8aebd5ad7fdf0871197d56 100644
--- a/Source/core/svg/SVGFilterElement.h
+++ b/Source/core/svg/SVGFilterElement.h
@@ -32,12 +32,14 @@
 #include "core/svg/SVGElement.h"
 #include "core/svg/SVGURIReference.h"
 #include "core/svg/SVGUnitTypes.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
 class SVGFilterElement final : public SVGElement,
                                public SVGURIReference {
     DEFINE_WRAPPERTYPEINFO();
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SVGFilterElement);
 public:
     DECLARE_NODE_FACTORY(SVGFilterElement);
     virtual void trace(Visitor*) override;
@@ -69,13 +71,13 @@ private:
 
     virtual bool selfHasRelativeLengths() const override;
 
-    RefPtr<SVGAnimatedLength> m_x;
-    RefPtr<SVGAnimatedLength> m_y;
-    RefPtr<SVGAnimatedLength> m_width;
-    RefPtr<SVGAnimatedLength> m_height;
-    RefPtr<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType> > m_filterUnits;
-    RefPtr<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType> > m_primitiveUnits;
-    RefPtr<SVGAnimatedIntegerOptionalInteger> m_filterRes;
+    RefPtrWillBeMember<SVGAnimatedLength> m_x;
+    RefPtrWillBeMember<SVGAnimatedLength> m_y;
+    RefPtrWillBeMember<SVGAnimatedLength> m_width;
+    RefPtrWillBeMember<SVGAnimatedLength> m_height;
+    RefPtrWillBeMember<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType> > m_filterUnits;
+    RefPtrWillBeMember<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType> > m_primitiveUnits;
+    RefPtrWillBeMember<SVGAnimatedIntegerOptionalInteger> m_filterRes;
 
     WillBeHeapHashSet<RefPtrWillBeMember<Node> > m_clientsToAdd;
 };