Add more missing closing namespace comments.

third_party/WebKit/Source/platform/text/UnicodeUtilities.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov.
  *
  * 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
@@ skipping 393 matching lines @@
         const size_t offset = compareKanaLetterAndComposedVoicedSoundMarks(a, aEnd, b, bEnd);
         if (offset == kNotFound)
             return false;
 
         // Update values of |a| and |b| after comparing.
         a += offset;
         b += offset;
     }
 }
 
-}
+} // namespace blink