Add more missing closing namespace comments.

third_party/WebKit/Source/web/ValidationMessageClientImpl.h

 /*
  * Copyright (C) 2012 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:
  * 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 47 matching lines @@
 
     WebViewImpl& m_webView;
     RawPtrWillBeMember<const Element> m_currentAnchor;
     String m_message;
     IntRect m_lastAnchorRectInScreen;
     float m_lastPageScaleFactor;
     double m_finishTime;
     Timer<ValidationMessageClientImpl> m_timer;
 };
 
-}
+} // namespace blink
 
 #endif