Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/graphics/filters/SVGFilter.cpp

Index: Source/core/svg/graphics/filters/SVGFilter.cpp
diff --git a/Source/core/svg/graphics/filters/SVGFilter.cpp b/Source/core/svg/graphics/filters/SVGFilter.cpp
index a163bef25d91567735739a14c302eee5f2656efb..a7f33fb9f3be9e8ec4a2b25a4cadcb9135f0019a 100644
--- a/Source/core/svg/graphics/filters/SVGFilter.cpp
+++ b/Source/core/svg/graphics/filters/SVGFilter.cpp
@@ -57,9 +57,9 @@ FloatPoint3D SVGFilter::resolve3dPoint(const FloatPoint3D& point) const
         point.z() * sqrtf(m_targetBoundingBox.size().diagonalLengthSquared() / 2));
 }
 
-PassRefPtr<SVGFilter> SVGFilter::create(const IntRect& absoluteSourceDrawingRegion, const FloatRect& targetBoundingBox, const FloatRect& filterRegion, bool effectBBoxMode)
+PassRefPtrWillBeRawPtr<SVGFilter> SVGFilter::create(const IntRect& absoluteSourceDrawingRegion, const FloatRect& targetBoundingBox, const FloatRect& filterRegion, bool effectBBoxMode)
 {
-    return adoptRef(new SVGFilter(absoluteSourceDrawingRegion, targetBoundingBox, filterRegion, effectBBoxMode));
+    return adoptRefWillBeNoop(new SVGFilter(absoluteSourceDrawingRegion, targetBoundingBox, filterRegion, effectBBoxMode));
 }
 
 } // namespace blink