Oilpan: move SVG property hierarchy to the heap.

Source/core/rendering/svg/ReferenceFilterBuilder.cpp

Index: Source/core/rendering/svg/ReferenceFilterBuilder.cpp
diff --git a/Source/core/rendering/svg/ReferenceFilterBuilder.cpp b/Source/core/rendering/svg/ReferenceFilterBuilder.cpp
index 3e1080de4caaf850921c2c6788fc7dcd64aab19b..3bb0c32b4e09cf42268e4ab6cad0441f4c5f782d 100644
--- a/Source/core/rendering/svg/ReferenceFilterBuilder.cpp
+++ b/Source/core/rendering/svg/ReferenceFilterBuilder.cpp
@@ -109,7 +109,7 @@ static bool getSVGElementColorSpace(SVGElement* svgElement, ColorSpace& cs)
     return true;
 }
 
-PassRefPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* parentFilter, RenderObject* renderer, FilterEffect* previousEffect, const ReferenceFilterOperation* filterOperation)
+PassRefPtrWillBeRawPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* parentFilter, RenderObject* renderer, FilterEffect* previousEffect, const ReferenceFilterOperation* filterOperation)
 {
     if (!renderer)
         return nullptr;
@@ -147,7 +147,7 @@ PassRefPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* parentFilter, Ren
     // wrong. We should probably be extracting the alpha from the
     // previousEffect, but this requires some more processing.
     // This may need a spec clarification.
-    RefPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(previousEffect, SourceAlpha::create(parentFilter));
+    RefPtrWillBeRawPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(previousEffect, SourceAlpha::create(parentFilter));
 
     ColorSpace filterColorSpace = ColorSpaceDeviceRGB;
     bool useFilterColorSpace = getSVGElementColorSpace(&filterElement, filterColorSpace);
@@ -158,7 +158,7 @@ PassRefPtr<FilterEffect> ReferenceFilterBuilder::build(Filter* parentFilter, Ren
 
         SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);
 
-        RefPtr<FilterEffect> effect = effectElement->build(builder.get(), parentFilter);
+        RefPtrWillBeRawPtr<FilterEffect> effect = effectElement->build(builder.get(), parentFilter);
         if (!effect)
             continue;