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

Source/core/layout/LayoutFrame.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 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 18 matching lines @@
 namespace blink {
 
 class HTMLFrameElement;
 
 class LayoutFrame final : public LayoutPart {
 public:
     explicit LayoutFrame(HTMLFrameElement*);
 
     FrameEdgeInfo edgeInfo() const;
 
-    virtual const char* name() const override { return "LayoutFrame"; }
+    const char* name() const override { return "LayoutFrame"; }
 
 private:
-    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectFrame || LayoutPart::isOfType(type); }
+    bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectFrame || LayoutPart::isOfType(type); }
 
-    virtual void updateFromElement() override;
+    void updateFromElement() override;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutFrame, isFrame());
 
 } // namespace blink
 
 #endif // LayoutFrame_h