Do not cause unnecessary node lists invalidation on id/name attribute change

Source/core/dom/LiveNodeList.h

 /*
  * 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, 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.
@@ skipping 48 matching lines @@
         document().registerNodeList(this);
     }
 
     virtual ~LiveNodeListBase()
     {
         document().unregisterNodeList(this);
     }
 
     ContainerNode& rootNode() const;
 
+    void didMoveToDocument(Document& oldDocument, Document& newDocument);
     ALWAYS_INLINE bool hasIdNameCache() const { return !isLiveNodeListType(type()); }
     ALWAYS_INLINE bool isRootedAtDocument() const { return m_rootType == NodeListIsRootedAtDocument || m_rootType == NodeListIsRootedAtDocumentIfOwnerHasItemrefAttr; }
     ALWAYS_INLINE NodeListInvalidationType invalidationType() const { return static_cast<NodeListInvalidationType>(m_invalidationType); }
     ALWAYS_INLINE CollectionType type() const { return static_cast<CollectionType>(m_collectionType); }
     ContainerNode* ownerNode() const { return m_ownerNode.get(); }
     ALWAYS_INLINE void invalidateCache(const QualifiedName* attrName) const
     {
         if (!attrName || shouldInvalidateTypeOnAttributeChange(invalidationType(), *attrName))
             invalidateCache();
         else if (hasIdNameCache() && (*attrName == HTMLNames::idAttr || *attrName == HTMLNames::nameAttr))
             invalidateIdNameCacheMaps();
     }
-    virtual void invalidateCache() const = 0;
+    virtual void invalidateCache(Document* oldDocument = 0) const = 0;
 
     static bool shouldInvalidateTypeOnAttributeChange(NodeListInvalidationType, const QualifiedName&);
 
 protected:
     Document& document() const { return m_ownerNode->document(); }
 
     ALWAYS_INLINE NodeListRootType rootType() const { return static_cast<NodeListRootType>(m_rootType); }
 
     template <typename Collection>
     static Element* iterateForPreviousNode(const Collection&, Node* current);
@@ skipping 37 matching lines @@
 public:
     LiveNodeList(PassRefPtr<ContainerNode> ownerNode, CollectionType collectionType, NodeListInvalidationType invalidationType, NodeListRootType rootType = NodeListIsRootedAtNode)
         : LiveNodeListBase(ownerNode.get(), rootType, invalidationType,
         collectionType)
     { }
 
     virtual unsigned length() const OVERRIDE FINAL { return m_collectionIndexCache.nodeCount(*this); }
     virtual Node* item(unsigned offset) const OVERRIDE FINAL { return m_collectionIndexCache.nodeAt(*this, offset); }
     virtual bool nodeMatches(const Element&) const = 0;
 
-    virtual void invalidateCache() const OVERRIDE FINAL;
+    virtual void invalidateCache(Document* oldDocument) const OVERRIDE FINAL;
     bool shouldOnlyIncludeDirectChildren() const { return false; }
 
     // Collection IndexCache API.
     bool canTraverseBackward() const { return true; }
     Element* itemBefore(const Element* previousItem) const;
     Element* traverseToFirstElement(const ContainerNode& root) const;
     Element* traverseForwardToOffset(unsigned offset, Element& currentNode, unsigned& currentOffset, const ContainerNode& root) const;
 
 private:
     virtual Node* virtualOwnerNode() const OVERRIDE FINAL;
 
     mutable CollectionIndexCache<LiveNodeList, Element> m_collectionIndexCache;
 };
 
 } // namespace WebCore
 
 #endif // LiveNodeList_h