Add missing closing namespace comments to wtf.

third_party/WebKit/Source/wtf/text/StringMac.mm

 /**
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 29 matching lines @@
             m_impl = StringImpl::create(lcharBuffer.data(), size);
             return;
         }
 
         Vector<UChar, 1024> ucharBuffer(size);
         CFStringGetCharacters(reinterpret_cast<CFStringRef>(str), CFRangeMake(0, size), ucharBuffer.data());
         m_impl = StringImpl::create(ucharBuffer.data(), size);
     }
 }
 
-}
+} // namespace WTF