Add more missing closing namespace comments.

third_party/WebKit/Source/core/fetch/ResourceClientWalker.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
@@ skipping 46 matching lines @@
         }
 
         return 0;
     }
 private:
     const HashCountedSet<ResourceClient*>& m_clientSet;
     Vector<ResourceClient*> m_clientVector;
     size_t m_index;
 };
 
-}
+} // namespace blink
 
 #endif