Make sure the rootNode of a LiveNodeListBase is always a ContainerNode

Source/core/html/HTMLTableRowsCollection.h

Index: Source/core/html/HTMLTableRowsCollection.h
diff --git a/Source/core/html/HTMLTableRowsCollection.h b/Source/core/html/HTMLTableRowsCollection.h
index d6179a958f2bb9bc2a35b934cd3fafba7a6e2a1a..e7324b2973b42c0ed1307cb95b727c647e7acc1d 100644
--- a/Source/core/html/HTMLTableRowsCollection.h
+++ b/Source/core/html/HTMLTableRowsCollection.h
@@ -38,13 +38,13 @@ class HTMLTableRowElement;
 
 class HTMLTableRowsCollection FINAL : public HTMLCollection {
 public:
-    static PassRefPtr<HTMLTableRowsCollection> create(Node*, CollectionType);
+    static PassRefPtr<HTMLTableRowsCollection> create(ContainerNode*, CollectionType);
 
     static HTMLTableRowElement* rowAfter(HTMLTableElement*, HTMLTableRowElement*);
     static HTMLTableRowElement* lastRow(HTMLTableElement*);
 
 private:
-    explicit HTMLTableRowsCollection(Node*);
+    explicit HTMLTableRowsCollection(ContainerNode*);
 
     virtual Element* virtualItemAfter(Element*) const OVERRIDE;
 };