Add more missing closing namespace comments.

third_party/WebKit/Source/platform/text/TextStream.h

 /*
  * Copyright (C) 2004, 2008 Apple 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 82 matching lines @@
     for (unsigned i = 0; i < size; ++i) {
         ts << vector[i];
         if (i < size - 1)
             ts << ", ";
     }
 
     ts << "]";
     return ts;
 }
 
-}
+} // namespace blink
 
 #endif