Add more missing closing namespace comments.

third_party/WebKit/Source/core/xml/XPathNodeSet.h

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 63 matching lines @@
 
 private:
     NodeSet() : m_isSorted(true), m_subtreesAreDisjoint(false) { }
     void traversalSort() const;
 
     bool m_isSorted;
     bool m_subtreesAreDisjoint;
     WillBeHeapVector<RefPtrWillBeMember<Node>> m_nodes;
 };
 
-}
+} // namespace XPath
 
-}
+} // namespace blink
 #endif // XPathNodeSet_h