Pass implementation object to supplemental classes by reference

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 23 matching lines @@
     , m_requiredExtensions(SVGStaticStringList::create(contextElement, SVGNames::requiredExtensionsAttr))
     , m_systemLanguage(SVGStaticStringList::create(contextElement, SVGNames::systemLanguageAttr))
 {
     ASSERT(contextElement);
 
     contextElement->addToPropertyMap(m_requiredFeatures);
     contextElement->addToPropertyMap(m_requiredExtensions);
     contextElement->addToPropertyMap(m_systemLanguage);
 }
 
-bool SVGTests::hasExtension(SVGTests*, const String&)
+bool SVGTests::hasExtension(SVGTests&, const String&)
 {
     // FIXME: Implement me!
     return false;
 }
 
 bool SVGTests::isValid() const
 {
     if (m_requiredFeatures->isSpecified()) {
         const Vector<String>& requiredFeatures = m_requiredFeatures->value()->values();
         Vector<String>::const_iterator it = requiredFeatures.begin();
@@ skipping 55 matching lines @@
 }
 
 void SVGTests::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
 {
     supportedAttributes.add(SVGNames::requiredFeaturesAttr);
     supportedAttributes.add(SVGNames::requiredExtensionsAttr);
     supportedAttributes.add(SVGNames::systemLanguageAttr);
 }
 
 }