[SVG2] Add tabindex handling in svg.

Source/core/svg/SVGGradientElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 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 38 matching lines @@
         SVG_SPREADMETHOD_REFLECT = SVGSpreadMethodRepeat,
         SVG_SPREADMETHOD_REPEAT = SVGSpreadMethodUnknown
     };
 
     Vector<Gradient::ColorStop> buildStops();
 
     SVGAnimatedTransformList* gradientTransform() { return m_gradientTransform.get(); }
     SVGAnimatedEnumeration<SVGSpreadMethodType>* spreadMethod() { return m_spreadMethod.get(); }
     SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>* gradientUnits() { return m_gradientUnits.get(); }
 
+    virtual bool supportsFocus() const OVERRIDE { return false; }
+
 protected:
     SVGGradientElement(const QualifiedName&, Document&);
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
 
 private:
     virtual bool needsPendingResourceHandling() const OVERRIDE FINAL { return false; }
 
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE FINAL;
 
     RefPtr<SVGAnimatedTransformList> m_gradientTransform;
     RefPtr<SVGAnimatedEnumeration<SVGSpreadMethodType> > m_spreadMethod;
     RefPtr<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType> > m_gradientUnits;
 };
 
 inline bool isSVGGradientElement(const Node& node)
 {
     return node.hasTagName(SVGNames::radialGradientTag) || node.hasTagName(SVGNames::linearGradientTag);
 }
 
 DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGGradientElement);
 
 } // namespace WebCore
 
 #endif