Have NodeList::item() overrides return an Element* when appropriate

Source/core/dom/NamedNodesCollection.cpp

 // Copyright (c) 2008, Google 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:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 16 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "config.h"
 #include "core/dom/NamedNodesCollection.h"
 
 #include "core/dom/Element.h"
 
 namespace WebCore {
 
-Node* NamedNodesCollection::item(unsigned index) const
+Element* NamedNodesCollection::item(unsigned index) const
 {
     if (index < m_nodes.size())
         return m_nodes[index].get();
     return 0;
 }
 
 void NamedNodesCollection::trace(Visitor* visitor)
 {
     visitor->trace(m_nodes);
     NodeList::trace(visitor);
 }
 
 } // namespace WebCore