Use stricter typing for NodeLists throughout the code base

Source/core/html/HTMLTableRowsCollection.h

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 31 matching lines @@
 
     static HTMLTableRowElement* rowAfter(HTMLTableElement&, HTMLTableRowElement*);
     static HTMLTableRowElement* lastRow(HTMLTableElement&);
 
 private:
     explicit HTMLTableRowsCollection(ContainerNode&);
 
     virtual Element* virtualItemAfter(Element*) const OVERRIDE;
 };
 
+DEFINE_TYPE_CASTS(HTMLTableRowsCollection, LiveNodeListBase, collection, collection->type() == TableRows, collection.type() == TableRows);
+
 } // namespace
 
 #endif