Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGPathSegArcRel.h

Index: Source/core/svg/SVGPathSegArcRel.h
diff --git a/Source/core/svg/SVGPathSegArcRel.h b/Source/core/svg/SVGPathSegArcRel.h
index 3400d7f9698586411d7d5166aabbfd7349d954f9..f1c6ad24fe2e2a19646402b46eb1db12e253e1a5 100644
--- a/Source/core/svg/SVGPathSegArcRel.h
+++ b/Source/core/svg/SVGPathSegArcRel.h
@@ -29,9 +29,9 @@ namespace blink {
 class SVGPathSegArcRel final : public SVGPathSegArc {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtr<SVGPathSegArcRel> create(SVGPathElement* element, float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag)
+    static PassRefPtrWillBeRawPtr<SVGPathSegArcRel> create(SVGPathElement* element, float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag)
     {
-        return adoptRef(new SVGPathSegArcRel(element, x, y, r1, r2, angle, largeArcFlag, sweepFlag));
+        return adoptRefWillBeNoop(new SVGPathSegArcRel(element, x, y, r1, r2, angle, largeArcFlag, sweepFlag));
     }
 
 private: