Oilpan: move SVG property hierarchy to the heap.

Source/core/css/resolver/FilterOperationResolver.cpp

Index: Source/core/css/resolver/FilterOperationResolver.cpp
diff --git a/Source/core/css/resolver/FilterOperationResolver.cpp b/Source/core/css/resolver/FilterOperationResolver.cpp
index 8500a4ac5516cacd048447d7d276ac1b2b8198a8..bdbcd58dd64adb914b073786d97cfa962bf65654 100644
--- a/Source/core/css/resolver/FilterOperationResolver.cpp
+++ b/Source/core/css/resolver/FilterOperationResolver.cpp
@@ -107,7 +107,7 @@ bool FilterOperationResolver::createFilterOperations(CSSValue* inValue, const CS
             CSSSVGDocumentValue* svgDocumentValue = toCSSSVGDocumentValue(argument);
             KURL url = state.document().completeURL(svgDocumentValue->url());
 
-            RefPtr<ReferenceFilterOperation> operation = ReferenceFilterOperation::create(svgDocumentValue->url(), AtomicString(url.fragmentIdentifier()));
+            RefPtrWillBeRawPtr<ReferenceFilterOperation> operation = ReferenceFilterOperation::create(svgDocumentValue->url(), AtomicString(url.fragmentIdentifier()));
             if (SVGURIReference::isExternalURIReference(svgDocumentValue->url(), state.document())) {
                 if (!svgDocumentValue->loadRequested())
                     state.elementStyleResources().addPendingSVGDocument(operation.get(), svgDocumentValue);