Merge DOMSettableTokensList into DOMTokensList

third_party/WebKit/Source/core/html/ClassList.cpp

 /*
  * 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 12 matching lines @@
  */
 
 #include "core/html/ClassList.h"
 
 #include "core/dom/Document.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
-ClassList::ClassList(Element* element) : m_element(element) { }
-
-#if !ENABLE(OILPAN)
-void ClassList::ref()
-{
-    m_element->ref();
-}
-
-void ClassList::deref()
-{
-    m_element->deref();
-}
-#endif
+ClassList::ClassList(Element* element) : DOMTokenList(nullptr), m_element(element) { }
 
 unsigned ClassList::length() const
 {
     return m_element->hasClass() ? classNames().size() : 0;
 }
 
 const AtomicString ClassList::item(unsigned index) const
 {
     if (index >= length())
         return AtomicString();
@@ skipping 16 matching lines @@
     return m_element->classNames();
 }
 
 DEFINE_TRACE(ClassList)
 {
     visitor->trace(m_element);
     DOMTokenList::trace(visitor);
 }
 
 } // namespace blink