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

Source/core/layout/LayoutDetailsMarker.h

 /*
  * Copyright (C) 2010, 2011 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 15 matching lines @@
 namespace blink {
 
 class LayoutDetailsMarker final : public LayoutBlockFlow {
 public:
     LayoutDetailsMarker(Element*);
 
     enum Orientation { Up, Down, Left, Right };
 
     Orientation orientation() const;
 
-    virtual const char* name() const override { return "LayoutDetailsMarker"; }
+    const char* name() const override { return "LayoutDetailsMarker"; }
 
 private:
-    virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectDetailsMarker || LayoutBlockFlow::isOfType(type); }
-    virtual void paint(const PaintInfo&, const LayoutPoint&) override;
+    bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectDetailsMarker || LayoutBlockFlow::isOfType(type); }
+    void paint(const PaintInfo&, const LayoutPoint&) override;
 
     bool isOpen() const;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutDetailsMarker, isDetailsMarker());
 
 }
 
 #endif // LayoutDetailsMarker_h