Remove unused NodeListIsRootedAtDocumentIfOwnerHasItemrefAttr NodeListRootType value

Source/core/dom/LiveNodeListBase.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.
  * Copyright (C) 2014 Samsung Electronics. 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
@@ skipping 15 matching lines @@
 #define LiveNodeListBase_h
 
 #include "HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/html/CollectionType.h"
 
 namespace WebCore {
 
 enum NodeListRootType {
     NodeListIsRootedAtNode,
-    NodeListIsRootedAtDocument,
-    NodeListIsRootedAtDocumentIfOwnerHasItemrefAttr,
+    NodeListIsRootedAtDocument
 };
 
 class LiveNodeListBase {
 public:
     LiveNodeListBase(ContainerNode* ownerNode, NodeListRootType rootType, NodeListInvalidationType invalidationType,
         CollectionType collectionType)
         : m_ownerNode(ownerNode)
         , m_rootType(rootType)
         , m_invalidationType(invalidationType)
         , m_collectionType(collectionType)
     {
         ASSERT(m_ownerNode);
         ASSERT(m_rootType == static_cast<unsigned>(rootType));
         ASSERT(m_invalidationType == static_cast<unsigned>(invalidationType));
         ASSERT(m_collectionType == static_cast<unsigned>(collectionType));
 
         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 bool isRootedAtDocument() const { return m_rootType == NodeListIsRootedAtDocument; }
     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(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);
     template <typename Collection>
     static Element* itemBefore(const Collection&, const Element* previousItem);
 
 private:
     void invalidateIdNameCacheMaps() const;
 
     RefPtr<ContainerNode> m_ownerNode; // Cannot be null.
-    const unsigned m_rootType : 2;
+    const unsigned m_rootType : 1;
     const unsigned m_invalidationType : 4;
     const unsigned m_collectionType : 5;
 };
 
 ALWAYS_INLINE bool LiveNodeListBase::shouldInvalidateTypeOnAttributeChange(NodeListInvalidationType type, const QualifiedName& attrName)
 {
     switch (type) {
     case InvalidateOnClassAttrChange:
         return attrName == HTMLNames::classAttr;
     case InvalidateOnNameAttrChange:
@@ skipping 11 matching lines @@
         return false;
     case InvalidateOnAnyAttrChange:
         return true;
     }
     return false;
 }
 
 } // namespace WebCore
 
 #endif // LiveNodeListBase_h