[SVG2] Add tabindex handling in svg.

Source/core/html/HTMLAnchorElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 248 matching lines @@
     return attribute.name().localName() == hrefAttr || HTMLElement::isURLAttribute(attribute);
 }
 
 bool HTMLAnchorElement::hasLegalLinkAttribute(const QualifiedName& name) const
 {
     return name == hrefAttr || HTMLElement::hasLegalLinkAttribute(name);
 }
 
 bool HTMLAnchorElement::canStartSelection() const
 {
-    // FIXME: We probably want this same behavior in SVGAElement too
     if (!isLink())
         return HTMLElement::canStartSelection();
     return rendererIsEditable();
 }
 
 bool HTMLAnchorElement::draggable() const
 {
     // Should be draggable if we have an href attribute.
     const AtomicString& value = getAttribute(draggableAttr);
     if (equalIgnoringCase(value, "true"))
@@ skipping 308 matching lines @@
     preconnectToURL(url, motivation);
     m_hasIssuedPreconnect = true;
 }
 
 bool HTMLAnchorElement::isInteractiveContent() const
 {
     return isLink();
 }
 
 }