Fix virtual/override/final usage in Source/core/html/.

Source/core/html/HTMLOptionsCollection.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 38 matching lines @@
 
     void setLength(unsigned, ExceptionState&);
     void namedGetter(const AtomicString& name, NodeListOrElement&);
     bool anonymousIndexedSetter(unsigned, PassRefPtrWillBeRawPtr<HTMLOptionElement>, ExceptionState&);
 
     bool elementMatches(const HTMLElement&) const;
 
 private:
     explicit HTMLOptionsCollection(ContainerNode&);
 
-    virtual void supportedPropertyNames(Vector<String>& names) override;
+    void supportedPropertyNames(Vector<String>& names) override;
 };
 
 DEFINE_TYPE_CASTS(HTMLOptionsCollection, LiveNodeListBase, collection, collection->type() == SelectOptions, collection.type() == SelectOptions);
 
 inline bool HTMLOptionsCollection::elementMatches(const HTMLElement& element) const
 {
     return isHTMLOptionElement(element);
 }
 
 } // namespace blink
 
 #endif // HTMLOptionsCollection_h