[oilpan] Implement accept methods to trace the class hierarchy of SVGElement and all sub-classes.

Source/core/svg/SVGFEComponentTransferElement.h

Index: Source/core/svg/SVGFEComponentTransferElement.h
diff --git a/Source/core/svg/SVGFEComponentTransferElement.h b/Source/core/svg/SVGFEComponentTransferElement.h
index 892af32914490ea83bdec508bffc57d5261f969a..eefff887b3aa5a47e9b0253c4fee805558fcb0f5 100644
--- a/Source/core/svg/SVGFEComponentTransferElement.h
+++ b/Source/core/svg/SVGFEComponentTransferElement.h
@@ -31,6 +31,8 @@ class SVGFEComponentTransferElement : public SVGFilterPrimitiveStandardAttribute
 public:
     static PassRefPtr<SVGFEComponentTransferElement> create(const QualifiedName&, const Handle<Document>&);
 
+    virtual void accept(Visitor* visitor) const OVERRIDE { SVGFilterPrimitiveStandardAttributes::accept(visitor); }
+
 private:
     SVGFEComponentTransferElement(const QualifiedName&, const Handle<Document>&);