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

Source/core/html/HTMLNameCollection.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007 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 12 matching lines @@
 #ifndef HTMLNameCollection_h
 #define HTMLNameCollection_h
 
 #include "core/html/HTMLCollection.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class HTMLNameCollection : public HTMLCollection {
 public:
-    virtual ~HTMLNameCollection();
+    ~HTMLNameCollection() override;
 
 protected:
     HTMLNameCollection(ContainerNode&, CollectionType, const AtomicString& name);
 
     AtomicString m_name;
 };
 
 }
 
 #endif