Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGPointList.idl

 /*
  * Copyright (C) 2006 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 [
     ImplementedAs=SVGPointListTearOff,
     SetWrapperReferenceTo(SVGElement contextElement),
     TypeChecking=Interface,
     RuntimeEnabled=SVG1DOM,
     MeasureAs=SVG1DOM,
+    WillBeGarbageCollected,
 ] interface SVGPointList {
     readonly attribute unsigned long length;
     [ImplementedAs=length] readonly attribute unsigned long numberOfItems;
 
     [RaisesException] void clear();
     [RaisesException] SVGPoint initialize(SVGPoint item);
     [RaisesException] getter SVGPoint getItem(unsigned long index);
     [RaisesException] setter SVGPoint (unsigned long index, SVGPoint value);
     [RaisesException] SVGPoint insertItemBefore(SVGPoint item, unsigned long index);
     [RaisesException] SVGPoint replaceItem(SVGPoint item, unsigned long index);
     [RaisesException] SVGPoint removeItem(unsigned long index);
     [RaisesException] SVGPoint appendItem(SVGPoint item);
 };