Update SVG classes to use OVERRIDE / FINAL when needed

Source/core/svg/SVGPathSegCurvetoQuadraticSmoothRel.h

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2013 Samsung Electronics. 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGPathSegCurvetoQuadraticSmoothRel_h
 #define SVGPathSegCurvetoQuadraticSmoothRel_h
 
 #include "core/svg/SVGPathSegWithContext.h"
 
 namespace WebCore {
 
-class SVGPathSegCurvetoQuadraticSmoothRel : public SVGPathSegSingleCoordinate {
+class SVGPathSegCurvetoQuadraticSmoothRel FINAL : public SVGPathSegSingleCoordinate {
 public:
     static PassRefPtr<SVGPathSegCurvetoQuadraticSmoothRel> create(SVGPathElement* element, SVGPathSegRole role, float x, float y)
     {
         return adoptRef(new SVGPathSegCurvetoQuadraticSmoothRel(element, role, x, y));
     }
 
 private:
     SVGPathSegCurvetoQuadraticSmoothRel(SVGPathElement* element, SVGPathSegRole role, float x, float y)
         : SVGPathSegSingleCoordinate(element, role, x, y)
     {
         ScriptWrappable::init(this);
     }
 
-    virtual unsigned short pathSegType() const { return PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL; }
-    virtual String pathSegTypeAsLetter() const { return "t"; }
+    virtual unsigned short pathSegType() const OVERRIDE { return PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL; }
+    virtual String pathSegTypeAsLetter() const OVERRIDE { return "t"; }
 };
 
 } // namespace WebCore
 
 #endif