[SVG2] Add tabindex handling in svg.

Source/core/svg/SVGMarkerElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 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 51 matching lines @@
     void setOrientToAngle(PassRefPtr<SVGAngleTearOff>);
 
     SVGAnimatedLength* refX() const { return m_refX.get(); }
     SVGAnimatedLength* refY() const { return m_refY.get(); }
     SVGAnimatedLength* markerWidth() const { return m_markerWidth.get(); }
     SVGAnimatedLength* markerHeight() const { return m_markerHeight.get(); }
     SVGAnimatedEnumeration<SVGMarkerUnitsType>* markerUnits() { return m_markerUnits.get(); }
     SVGAnimatedAngle* orientAngle() { return m_orientAngle.get(); }
     SVGAnimatedEnumeration<SVGMarkerOrientType>* orientType() { return m_orientAngle->orientType(); }
 
+    virtual bool supportsFocus() const OVERRIDE { return false; }
+
 private:
     explicit SVGMarkerElement(Document&);
 
     virtual bool needsPendingResourceHandling() const OVERRIDE { return false; }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
 
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE { return true; }
 
     virtual bool selfHasRelativeLengths() const OVERRIDE;
 
     RefPtr<SVGAnimatedLength> m_refX;
     RefPtr<SVGAnimatedLength> m_refY;
     RefPtr<SVGAnimatedLength> m_markerWidth;
     RefPtr<SVGAnimatedLength> m_markerHeight;
     RefPtr<SVGAnimatedAngle> m_orientAngle;
     RefPtr<SVGAnimatedEnumeration<SVGMarkerUnitsType> > m_markerUnits;
 };
 
 }
 
 #endif