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

Source/core/dom/EmptyNodeList.cpp

Index: Source/core/dom/EmptyNodeList.cpp
diff --git a/Source/core/dom/EmptyNodeList.cpp b/Source/core/dom/EmptyNodeList.cpp
index 5f731886dccce6b77d27d759b90fe2f74d69bfbd..8705936f54d568d81a721fe9c456bdf9ea15e0e7 100644
--- a/Source/core/dom/EmptyNodeList.cpp
+++ b/Source/core/dom/EmptyNodeList.cpp
@@ -42,4 +42,9 @@ EmptyNodeList::~EmptyNodeList()
     m_owner->nodeLists()->removeEmptyChildNodeList(this);
 }
 
+Node* EmptyNodeList::virtualOwnerNode() const
+{
+    return ownerNode();
+}
+
 } // namespace WebCore