Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGFilterPrimitiveStandardAttributes.h

Index: Source/core/svg/SVGFilterPrimitiveStandardAttributes.h
diff --git a/Source/core/svg/SVGFilterPrimitiveStandardAttributes.h b/Source/core/svg/SVGFilterPrimitiveStandardAttributes.h
index a05c92c21fec8d465f456837e181903024de84ac..1bdab5b679b6b4bc93546f3844a64556ff7db805 100644
--- a/Source/core/svg/SVGFilterPrimitiveStandardAttributes.h
+++ b/Source/core/svg/SVGFilterPrimitiveStandardAttributes.h
@@ -24,6 +24,7 @@
 #include "core/svg/SVGAnimatedLength.h"
 #include "core/svg/SVGAnimatedString.h"
 #include "core/svg/SVGElement.h"
+#include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
@@ -40,7 +41,7 @@ class SVGFilterPrimitiveStandardAttributes : public SVGElement {
 public:
     void setStandardAttributes(FilterEffect*) const;
 
-    virtual PassRefPtr<FilterEffect> build(SVGFilterBuilder*, Filter* filter) = 0;
+    virtual PassRefPtrWillBeRawPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) = 0;
     // Returns true, if the new value is different from the old one.
     virtual bool setFilterEffectAttribute(FilterEffect*, const QualifiedName&);
 
@@ -51,6 +52,8 @@ public:
     SVGAnimatedLength* height() const { return m_height.get(); }
     SVGAnimatedString* result() const { return m_result.get(); }
 
+    virtual void trace(Visitor*) override;
+
 protected:
     SVGFilterPrimitiveStandardAttributes(const QualifiedName&, Document&);
 
@@ -68,11 +71,11 @@ private:
     virtual RenderObject* createRenderer(RenderStyle*) override final;
     virtual bool rendererIsNeeded(const RenderStyle&) override final;
 
-    RefPtr<SVGAnimatedLength> m_x;
-    RefPtr<SVGAnimatedLength> m_y;
-    RefPtr<SVGAnimatedLength> m_width;
-    RefPtr<SVGAnimatedLength> m_height;
-    RefPtr<SVGAnimatedString> m_result;
+    RefPtrWillBeMember<SVGAnimatedLength> m_x;
+    RefPtrWillBeMember<SVGAnimatedLength> m_y;
+    RefPtrWillBeMember<SVGAnimatedLength> m_width;
+    RefPtrWillBeMember<SVGAnimatedLength> m_height;
+    RefPtrWillBeMember<SVGAnimatedString> m_result;
 };
 
 void invalidateFilterPrimitiveParent(SVGElement*);