Bring back ref to element in ClassList and RelList

third_party/WebKit/Source/core/dom/DOMTokenList.h

Index: third_party/WebKit/Source/core/dom/DOMTokenList.h
diff --git a/third_party/WebKit/Source/core/dom/DOMTokenList.h b/third_party/WebKit/Source/core/dom/DOMTokenList.h
index f0d36611b555dce17dedd76493f32a47a770ec55..84ebc86ada16fe32268d970262b14829c04a3152 100644
--- a/third_party/WebKit/Source/core/dom/DOMTokenList.h
+++ b/third_party/WebKit/Source/core/dom/DOMTokenList.h
@@ -58,6 +58,10 @@ public:
     }
 
     virtual ~DOMTokenList() { }
+#if !ENABLE(OILPAN)
+    virtual void ref() { RefCounted<DOMTokenList>::ref(); }
+    virtual void deref() { RefCounted<DOMTokenList>::deref(); }
+#endif
 
     virtual unsigned length() const { return m_tokens.size(); }
     virtual const AtomicString item(unsigned index) const;