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

Source/core/html/HTMLFrameElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2004, 2006, 2009 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 22 matching lines @@
 public:
     DECLARE_NODE_FACTORY(HTMLFrameElement);
 
     bool hasFrameBorder() const { return m_frameBorder; }
 
     bool noResize() const;
 
 private:
     explicit HTMLFrameElement(Document&);
 
-    virtual void attach(const AttachContext& = AttachContext()) override;
+    void attach(const AttachContext& = AttachContext()) override;
 
-    virtual bool layoutObjectIsNeeded(const ComputedStyle&) override;
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    bool layoutObjectIsNeeded(const ComputedStyle&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
 
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
 
     bool m_frameBorder;
     bool m_frameBorderSet;
 };
 
 } // namespace blink
 
 #endif // HTMLFrameElement_h