Add support for SVG Clip paths in HTML

Source/core/svg/SVGClipPathElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. 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 72 matching lines @@
 
     if (change.byParser)
         return;
 
     if (RenderObject* object = renderer())
         object->setNeedsLayoutAndFullPaintInvalidation();
 }
 
 RenderObject* SVGClipPathElement::createRenderer(RenderStyle*)
 {
-    return new RenderSVGResourceClipper(this);
+    RenderSVGResourceClipper* renderer = new RenderSVGResourceClipper(this);
+
+    WillBeHeapHashSet<RefPtrWillBeMember<Node> >::iterator layerEnd = m_clientsToAdd.end();
+    for (WillBeHeapHashSet<RefPtrWillBeMember<Node> >::iterator it = m_clientsToAdd.begin(); it != layerEnd; ++it)
+        renderer->addClientRenderLayer(it->get());
+    m_clientsToAdd.clear();
+
+    return renderer;
+}
+
+void SVGClipPathElement::addClient(Node* client)
+{
+    ASSERT(client);
+    m_clientsToAdd.add(client);
+}
+
+void SVGClipPathElement::removeClient(Node* client)
+{
+    ASSERT(client);
+    m_clientsToAdd.remove(client);
 }
 
 }