Merge 75193 - Merge 75168

WebCore/css/CSSStyleSheet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007 Apple Inc. 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 146 matching lines @@
 }
 
 void CSSStyleSheet::deleteRule(unsigned index, ExceptionCode& ec)
 {
     if (index >= length()) {
         ec = INDEX_SIZE_ERR;
         return;
     }
 
     ec = 0;
+    item(index)->setParent(0);
     remove(index);
     styleSheetChanged();
 }
 
 void CSSStyleSheet::addNamespace(CSSParser* p, const AtomicString& prefix, const AtomicString& uri)
 {
     if (uri.isNull())
         return;
 
     m_namespaces = adoptPtr(new CSSNamespace(prefix, uri, m_namespaces.release()));
@@ skipping 98 matching lines @@
             if (rule->isImportRule()) {
                 if (CSSStyleSheet* ruleStyleSheet = static_cast<CSSImportRule*>(rule)->styleSheet())
                     styleSheetQueue.append(ruleStyleSheet);
             }
             rule->addSubresourceStyleURLs(urls);
         }
     }
 }
 
 }