Generate toCSSFooValue for CSSFunctionValue and CSSSVGDocumentValue

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 39d0f95001ba6714fcb0da62395bcda6bbb3e54a..c6d6c624b7298177c065e2838f8708dda6ee12ee 100644
--- a/Source/core/css/resolver/FilterOperationResolver.cpp
+++ b/Source/core/css/resolver/FilterOperationResolver.cpp
@@ -398,10 +398,10 @@ bool FilterOperationResolver::createFilterOperations(CSSValue* inValue, const Re
                 continue;
             CSSValue* argument = filterValue->itemWithoutBoundsCheck(0);
 
-            if (!argument->isCSSSVGDocumentValue())
+            if (!argument->isSVGDocumentValue())
                 continue;
 
-            CSSSVGDocumentValue* svgDocumentValue = static_cast<CSSSVGDocumentValue*>(argument);
+            CSSSVGDocumentValue* svgDocumentValue = toCSSSVGDocumentValue(argument);
             KURL url = state.document().completeURL(svgDocumentValue->url());
 
             RefPtr<ReferenceFilterOperation> operation = ReferenceFilterOperation::create(svgDocumentValue->url(), url.fragmentIdentifier(), operationType);