Fix non-Oilpan ref pointer usage over DOMTokenLists.

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 41 matching lines @@
     USING_FAST_MALLOC_WILL_BE_REMOVED(DOMTokenList);
     WTF_MAKE_NONCOPYABLE(DOMTokenList);
 public:
     static PassRefPtrWillBeRawPtr<DOMTokenList> create(DOMTokenListObserver* observer = nullptr)
     {
         return adoptRefWillBeNoop(new DOMTokenList(observer));
     }
 
     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;
 
     bool contains(const AtomicString&, ExceptionState&) const;
     virtual void add(const Vector<String>&, ExceptionState&);
     void add(const AtomicString&, ExceptionState&);
     virtual void remove(const Vector<String>&, ExceptionState&);
     void remove(const AtomicString&, ExceptionState&);
     bool toggle(const AtomicString&, ExceptionState&);
     bool toggle(const AtomicString&, bool force, ExceptionState&);
@@ skipping 34 matching lines @@
 private:
     IterationSource* startIteration(ScriptState*, ExceptionState&) override;
     SpaceSplitString m_tokens;
     AtomicString m_value;
     RawPtrWillBeWeakMember<DOMTokenListObserver> m_observer;
 };
 
 } // namespace blink
 
 #endif // DOMTokenList_h