[SVG2] Merge SVGStyledElement into SVGElement

Source/core/svg/SVGElementInstance.cpp

 /*
  * Copyright (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2011 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * 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.
  *
@@ skipping 154 matching lines @@
 void SVGElementInstance::appendChild(PassRefPtr<SVGElementInstance> child)
 {
     appendChildToContainer<SVGElementInstance, SVGElementInstance>(child.get(), this);
 }
 
 void SVGElementInstance::invalidateAllInstancesOfElement(SVGElement* element)
 {
     if (!element || !element->inDocument())
         return;
 
-    if (element->isSVGStyledElement() && toSVGStyledElement(element)->instanceUpdatesBlocked())
+    if (element->instanceUpdatesBlocked())
         return;
 
     const HashSet<SVGElementInstance*>& set = element->instancesForElement();
     if (set.isEmpty())
         return;
 
     // Mark all use elements referencing 'element' for rebuilding
     const HashSet<SVGElementInstance*>::const_iterator end = set.end();
     for (HashSet<SVGElementInstance*>::const_iterator it = set.begin(); it != end; ++it) {
         ASSERT((*it)->shadowTreeElement());
@@ skipping 63 matching lines @@
 
 EventTargetData* SVGElementInstance::ensureEventTargetData()
 {
     // EventTarget would use these methods if we were actually using its add/removeEventListener logic.
     // As we're forwarding those calls to the correspondingElement(), no one should ever call this function.
     ASSERT_NOT_REACHED();
     return 0;
 }
 
 SVGElementInstance::InstanceUpdateBlocker::InstanceUpdateBlocker(SVGElement* targetElement)
-    : m_targetElement(targetElement->isSVGStyledElement() ? toSVGStyledElement(targetElement) : 0)
+    : m_targetElement(targetElement)
 {
     if (m_targetElement)
         m_targetElement->setInstanceUpdatesBlocked(true);
 }
 
 SVGElementInstance::InstanceUpdateBlocker::~InstanceUpdateBlocker()
 {
     if (m_targetElement)
         m_targetElement->setInstanceUpdatesBlocked(false);
 }
 
 }