Make NodeList::ownerNode() virtual and rename to virtualOwnerNode()

Source/core/dom/NodeList.h

Index: Source/core/dom/NodeList.h
diff --git a/Source/core/dom/NodeList.h b/Source/core/dom/NodeList.h
index 2a99530bb76993d1ad97027efa8443e7386767c8..76c51dae695d72694d45b99f3ee92b2bc83ad55c 100644
--- a/Source/core/dom/NodeList.h
+++ b/Source/core/dom/NodeList.h
@@ -41,11 +41,10 @@ public:
     virtual Node* item(unsigned index) const = 0;
 
     // Other methods (not part of DOM)
-    virtual bool isLiveNodeList() const { return false; }
     virtual bool isEmptyNodeList() const { return false; }
     virtual bool isChildNodeList() const { return false; }
 
-    Node* ownerNode() const;
+    virtual Node* virtualOwnerNode() const { return 0; }
 
 protected:
     NodeList()