Move LiveNodeList code out of HTMLCollection.cpp

Source/core/dom/LiveNodeList.cpp

Index: Source/core/dom/LiveNodeList.cpp
diff --git a/Source/core/dom/LiveNodeList.cpp b/Source/core/dom/LiveNodeList.cpp
index f1aff4d9d5fecef6a3fd8753cb8297b99bef1e2b..8f7c6cc28924137ff7f80322c991d1f0eee3c798 100644
--- a/Source/core/dom/LiveNodeList.cpp
+++ b/Source/core/dom/LiveNodeList.cpp
@@ -25,6 +25,11 @@
 
 namespace WebCore {
 
+static inline bool isMatchingElement(const LiveNodeList& nodeList, const Element& element)
+{
+    return nodeList.nodeMatches(element);
+}
+
 Node* LiveNodeList::virtualOwnerNode() const
 {
     return &ownerNode();
@@ -35,4 +40,19 @@ void LiveNodeList::invalidateCache(Document*) const
     m_collectionIndexCache.invalidate();
 }
 
+Element* LiveNodeList::itemBefore(const Element* previous) const
+{
+    return LiveNodeListBase::itemBefore(*this, previous);
+}
+
+Element* LiveNodeList::traverseToFirstElement(const ContainerNode& root) const
+{
+    return firstMatchingElement(*this, root);
+}
+
+Element* LiveNodeList::traverseForwardToOffset(unsigned offset, Element& currentNode, unsigned& currentOffset, const ContainerNode& root) const
+{
+    return traverseMatchingElementsForwardToOffset(*this, offset, currentNode, currentOffset, root);
+}
+
 } // namespace WebCore