Rename ExceptionCode constants to use the names in the spec (2/3)

Source/core/xml/XPathResult.cpp

 /*
  * Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
  * Copyright (C) 2006, 2009 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.
@@ skipping 167 matching lines @@
 }
 
 Node* XPathResult::iterateNext(ExceptionCode& ec)
 {
     if (resultType() != UNORDERED_NODE_ITERATOR_TYPE && resultType() != ORDERED_NODE_ITERATOR_TYPE) {
         ec = TypeError;
         return 0;
     }
     
     if (invalidIteratorState()) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return 0;
     }
     
     if (m_nodeSetPosition + 1 > m_nodeSet.size())
         return 0;
 
     Node* node = m_nodeSet[m_nodeSetPosition];
     
     m_nodeSetPosition++;
 
     return node;
 }
 
 Node* XPathResult::snapshotItem(unsigned long index, ExceptionCode& ec)
 {
     if (resultType() != UNORDERED_NODE_SNAPSHOT_TYPE && resultType() != ORDERED_NODE_SNAPSHOT_TYPE) {
         ec = TypeError;
         return 0;
     }
     
     const NodeSet& nodes = m_value.toNodeSet();
     if (index >= nodes.size())
         return 0;
     
     return nodes[index];
 }
 
 }