Add more missing closing namespace comments.

third_party/WebKit/Source/core/html/track/vtt/VTTToken.h

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 73 matching lines @@
     VTTToken(Type::Type type, const String& data)
         : m_type(type)
         , m_data(data) { }
 
     Type::Type m_type;
     String m_data;
     AtomicString m_annotation;
     AtomicString m_classes;
 };
 
-}
+} // namespace blink
 
 #endif