Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGPathSegArcRel.h

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 11 matching lines @@
 #ifndef SVGPathSegArcRel_h
 #define SVGPathSegArcRel_h
 
 #include "core/svg/SVGPathSegArc.h"
 
 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:
     SVGPathSegArcRel(SVGPathElement* element, float x, float y, float r1, float r2, float angle, bool largeArcFlag, bool sweepFlag)
         : SVGPathSegArc(element, x, y, r1, r2, angle, largeArcFlag, sweepFlag) { }
 
     virtual unsigned short pathSegType() const override { return PATHSEG_ARC_REL; }
     virtual String pathSegTypeAsLetter() const override { return "a"; }
 };
 
 } // namespace blink
 
 #endif // SVGPathSegArcRel_h