Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGFEImageElement.h

Index: Source/core/svg/SVGFEImageElement.h
diff --git a/Source/core/svg/SVGFEImageElement.h b/Source/core/svg/SVGFEImageElement.h
index 38228d2c9b155035b3085ff89470f9875a999b28..e91c1d59e08c72c0a8a14ed47a67a164a615dcfd 100644
--- a/Source/core/svg/SVGFEImageElement.h
+++ b/Source/core/svg/SVGFEImageElement.h
@@ -28,6 +28,7 @@
 #include "core/svg/SVGAnimatedPreserveAspectRatio.h"
 #include "core/svg/SVGFilterPrimitiveStandardAttributes.h"
 #include "core/svg/SVGURIReference.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
@@ -35,6 +36,7 @@ class SVGFEImageElement final : public SVGFilterPrimitiveStandardAttributes,
                                 public SVGURIReference,
                                 public ImageResourceClient {
     DEFINE_WRAPPERTYPEINFO();
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SVGFEImageElement);
 public:
     DECLARE_NODE_FACTORY(SVGFEImageElement);
 
@@ -43,6 +45,8 @@ public:
     virtual ~SVGFEImageElement();
     SVGAnimatedPreserveAspectRatio* preserveAspectRatio() { return m_preserveAspectRatio.get(); }
 
+    virtual void trace(Visitor*) override;
+
 private:
     explicit SVGFEImageElement(Document&);
 
@@ -51,7 +55,7 @@ private:
     virtual void svgAttributeChanged(const QualifiedName&) override;
     virtual void notifyFinished(Resource*) override;
 
-    virtual PassRefPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) override;
+    virtual PassRefPtrWillBeRawPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) override;
 
     void clearResourceReferences();
     void fetchImageResource();
@@ -60,7 +64,7 @@ private:
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
     virtual void removedFrom(ContainerNode*) override;
 
-    RefPtr<SVGAnimatedPreserveAspectRatio> m_preserveAspectRatio;
+    RefPtrWillBeMember<SVGAnimatedPreserveAspectRatio> m_preserveAspectRatio;
 
     ResourcePtr<ImageResource> m_cachedImage;
 };