Make sure the rootNode of a LiveNodeListBase is always a ContainerNode

Source/core/dom/Node.h

Index: Source/core/dom/Node.h
diff --git a/Source/core/dom/Node.h b/Source/core/dom/Node.h
index 12f25fd45e52937e72761f7bd17cb251601589dd..c56d37472527c0cf05c2eb7dabe56d829d92a822 100644
--- a/Source/core/dom/Node.h
+++ b/Source/core/dom/Node.h
@@ -592,12 +592,6 @@ public:
     NodeListsNodeData* nodeLists();
     void clearNodeLists();
 
-    PassRefPtr<NodeList> getElementsByTagName(const AtomicString&);
-    PassRefPtr<NodeList> getElementsByTagNameNS(const AtomicString& namespaceURI, const AtomicString& localName);
-    PassRefPtr<NodeList> getElementsByName(const AtomicString& elementName);
-    PassRefPtr<NodeList> getElementsByClassName(const AtomicString& classNames);
-    PassRefPtr<RadioNodeList> radioNodeList(const AtomicString&, bool onlyMatchImgElements = false);
-
     virtual bool willRespondToMouseMoveEvents();
     virtual bool willRespondToMouseClickEvents();
     virtual bool willRespondToTouchEvents();