Make supportsMarkers non virtual

Source/core/svg/SVGPolyElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  *
  * 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,
@@ skipping 27 matching lines @@
 protected:
     SVGPolyElement(const QualifiedName&, Document&);
 
 private:
     virtual bool supportsFocus() const OVERRIDE FINAL { return hasFocusEventListeners(); }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE FINAL;
     virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE FINAL;
 
-    virtual bool supportsMarkers() const OVERRIDE FINAL { return true; }
-
 private:
     RefPtr<SVGAnimatedPointList> m_points;
 
 };
 
 inline bool isSVGPolyElement(const Node& node)
 {
     return node.hasTagName(SVGNames::polygonTag) || node.hasTagName(SVGNames::polylineTag);
 }
 
 DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGPolyElement);
 
 } // namespace WebCore
 
 #endif