Oilpan: Ensure that classes with virtual trace methods always have vtables for their left-most base…

Source/core/svg/SVGFEImageElement.h

Index: Source/core/svg/SVGFEImageElement.h
diff --git a/Source/core/svg/SVGFEImageElement.h b/Source/core/svg/SVGFEImageElement.h
index 6a41197089aa95e9f1c1138e749345f95b206ad3..02ac2d5d647b77294bde652cfcf7388932192522 100644
--- a/Source/core/svg/SVGFEImageElement.h
+++ b/Source/core/svg/SVGFEImageElement.h
@@ -44,6 +44,12 @@ public:
     virtual ~SVGFEImageElement();
     SVGAnimatedPreserveAspectRatio* preserveAspectRatio() { return m_preserveAspectRatio.get(); }
 
+    virtual void trace(Visitor* visitor) OVERRIDE
+    {
+        SVGFilterPrimitiveStandardAttributes::trace(visitor);
+        ImageResourceClient::trace(visitor);
+    }
+
 private:
     explicit SVGFEImageElement(Document&);