Get rid of unnecessary isChildNodeList() virtual call in clearChildNodeListCache()

Source/core/dom/Node.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 820 matching lines @@
 
 unsigned Node::nodeIndex() const
 {
     Node *_tempNode = previousSibling();
     unsigned count=0;
     for ( count=0; _tempNode; count++ )
         _tempNode = _tempNode->previousSibling();
     return count;
 }
 
-void Node::invalidateNodeListCachesInAncestors(const QualifiedName* attrName, Element* attributeOwnerElement)
-{
-    if (hasRareData() && (!attrName || isAttributeNode())) {
-        if (NodeListsNodeData* lists = rareData()->nodeLists())
-            lists->clearChildNodeListCache();
-    }
-
-    // Modifications to attributes that are not associated with an Element can't invalidate NodeList caches.
-    if (attrName && !attributeOwnerElement)
-        return;
-
-    if (!document().shouldInvalidateNodeListCaches(attrName))
-        return;
-
-    document().invalidateNodeListCaches(attrName);
-
-    for (Node* node = this; node; node = node->parentNode()) {
-        if (NodeListsNodeData* lists = node->nodeLists())
-            lists->invalidateCaches(attrName);
-    }
-}
-
 NodeListsNodeData* Node::nodeLists()
 {
     return hasRareData() ? rareData()->nodeLists() : 0;
 }
 
 void Node::clearNodeLists()
 {
     rareData()->clearNodeLists();
 }
 
@@ skipping 1696 matching lines @@
         node->showTreeForThis();
 }
 
 void showNodePath(const blink::Node* node)
 {
     if (node)
         node->showNodePathForThis();
 }
 
 #endif