Merge 91005

Source/WebCore/svg/SVGUseElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2009-2010. 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 691 matching lines @@
 
     fprintf(stderr, "Dumping <use> shadow tree markup:\n%s\n", markup.latin1().data());
 #endif
 }
 
 void SVGUseElement::detachInstance()
 {
     if (!m_targetElementInstance)
         return;
     m_targetElementInstance->clearUseElements();
+    m_targetElementInstance->clearChildren();
     m_targetElementInstance = 0;
 }
 
 RenderObject* SVGUseElement::createRenderer(RenderArena* arena, RenderStyle*)
 {
     return new (arena) RenderSVGShadowTreeRootContainer(this);
 }
 
 static void updateFromElementCallback(Node* node)
 {
@@ skipping 447 matching lines @@
     SVGElement* element = m_targetElementInstance->correspondingElement();
     if (!element || !element->isStyled())
         return false;
 
     return static_cast<SVGStyledElement*>(element)->hasRelativeLengths();
 }
 
 }
 
 #endif // ENABLE(SVG)