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

Source/core/layout/svg/line/SVGRootInlineBox.h

 /*
  * Copyright (C) 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
  * Copyright (C) 2006 Apple Computer Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. 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 SVGRootInlineBox final : public RootInlineBox {
 public:
     SVGRootInlineBox(LayoutBlockFlow& block)
         : RootInlineBox(block)
         , m_logicalHeight(0)
     {
     }
 
-    virtual bool isSVGRootInlineBox() const override { return true; }
+    bool isSVGRootInlineBox() const override { return true; }
 
-    virtual LayoutUnit virtualLogicalHeight() const override { return m_logicalHeight; }
+    LayoutUnit virtualLogicalHeight() const override { return m_logicalHeight; }
     void setLogicalHeight(LayoutUnit height) { m_logicalHeight = height; }
 
-    virtual void paint(const PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) override;
+    void paint(const PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) override;
 
-    virtual void markDirty() override;
+    void markDirty() override;
 
     void computePerCharacterLayoutInformation();
 
     InlineBox* closestLeafChildForPosition(const LayoutPoint&);
 
 private:
     void reorderValueLists(Vector<SVGTextLayoutAttributes*>&);
     void layoutChildBoxes(InlineFlowBox*, LayoutRect* = nullptr);
     void layoutRootBox(const LayoutRect&);
 
 private:
     LayoutUnit m_logicalHeight;
 };
 
 DEFINE_INLINE_BOX_TYPE_CASTS(SVGRootInlineBox);
 
 } // namespace blink
 
 #endif // SVGRootInlineBox_h