[SVG2] Add tabindex handling in svg.

Source/core/svg/SVGGElement.h

 /*
  * Copyright (C) 2004, 2005, 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 18 matching lines @@
 class SVGGElement FINAL : public SVGGraphicsElement {
 public:
     static PassRefPtr<SVGGElement> create(Document&);
 
 protected:
     explicit SVGGElement(Document&, ConstructionType = CreateSVGElement);
 
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
 
 private:
-    virtual bool supportsFocus() const OVERRIDE { return hasFocusEventListeners(); }
-
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
 
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
 
 };
 
 } // namespace WebCore
 
 #endif