SVGTests should not leave detached elements in the tree

Source/core/svg/SVGTests.cpp

 /*
  * Copyright (C) 2004, 2005, 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 128 matching lines @@
     return false;
 }
 
 bool SVGTests::isKnownAttribute(const QualifiedName& attrName)
 {
     return attrName == SVGNames::requiredFeaturesAttr
         || attrName == SVGNames::requiredExtensionsAttr
         || attrName == SVGNames::systemLanguageAttr;
 }
 
-bool SVGTests::handleAttributeChange(SVGElement* targetElement, const QualifiedName& attrName)
-{
-    ASSERT(targetElement);
-    if (!isKnownAttribute(attrName))
-        return false;
-    if (!targetElement->inDocument())
-        return true;
-
-    bool valid = targetElement->isValid();
-    if (valid && !targetElement->confusingAndOftenMisusedAttached() && targetElement->parentNode()->confusingAndOftenMisusedAttached())
-        targetElement->lazyAttach();
-    else if (!valid && targetElement->confusingAndOftenMisusedAttached())
-        targetElement->detach();
-
-    return true;
-}
-
 void SVGTests::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
 {
     supportedAttributes.add(SVGNames::requiredFeaturesAttr);
     supportedAttributes.add(SVGNames::requiredExtensionsAttr);
     supportedAttributes.add(SVGNames::systemLanguageAttr);
 }
 
 void SVGTests::synchronizeRequiredFeatures(SVGElement* contextElement)
 {
     ASSERT(contextElement);
@@ skipping 33 matching lines @@
     return m_requiredExtensions.value;
 }
 
 SVGStringList& SVGTests::systemLanguage()
 {
     m_systemLanguage.shouldSynchronize = true;
     return m_systemLanguage.value;
 }
 
 }