Add missing closing namespace comments to wtf.

third_party/WebKit/Source/wtf/text/StringHash.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2012, 2013 Apple Inc. All rights reserved
  * Copyright (C) Research In Motion Limited 2009. 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 143 matching lines @@
     static unsigned avoidDeletedValue(unsigned hash)
     {
         ASSERT(hash);
         unsigned newHash = hash | (!(hash + 1) << 31);
         ASSERT(newHash);
         ASSERT(newHash != 0xFFFFFFFF);
         return newHash;
     }
 };
 
-}
+} // namespace WTF
 
 using WTF::AlreadyHashed;
 using WTF::CaseFoldingHash;
 using WTF::StringHash;
 
 #endif