Oilpan: move SVG property hierarchy to the heap.

Source/platform/graphics/filters/FEConvolveMatrix.cpp

Index: Source/platform/graphics/filters/FEConvolveMatrix.cpp
diff --git a/Source/platform/graphics/filters/FEConvolveMatrix.cpp b/Source/platform/graphics/filters/FEConvolveMatrix.cpp
index ea75eac99cd41cc80c1f50e115ce47cc86054aaa..35c17783039dac0ee52a150f974837b63c9b1400 100644
--- a/Source/platform/graphics/filters/FEConvolveMatrix.cpp
+++ b/Source/platform/graphics/filters/FEConvolveMatrix.cpp
@@ -49,11 +49,11 @@ FEConvolveMatrix::FEConvolveMatrix(Filter* filter, const IntSize& kernelSize,
     ASSERT(m_kernelSize.height() > 0);
 }
 
-PassRefPtr<FEConvolveMatrix> FEConvolveMatrix::create(Filter* filter, const IntSize& kernelSize,
+PassRefPtrWillBeRawPtr<FEConvolveMatrix> FEConvolveMatrix::create(Filter* filter, const IntSize& kernelSize,
     float divisor, float bias, const IntPoint& targetOffset, EdgeModeType edgeMode,
     const FloatPoint& kernelUnitLength, bool preserveAlpha, const Vector<float>& kernelMatrix)
 {
-    return adoptRef(new FEConvolveMatrix(filter, kernelSize, divisor, bias, targetOffset, edgeMode, kernelUnitLength,
+    return adoptRefWillBeNoop(new FEConvolveMatrix(filter, kernelSize, divisor, bias, targetOffset, edgeMode, kernelUnitLength,
         preserveAlpha, kernelMatrix));
 }