Add more missing closing namespace comments.

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

 /*
  * Copyright (C) 2004, 2008, 2010 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 182 matching lines @@
     return ts << FloatSize(size);
 }
 
 
 void writeIndent(TextStream& ts, int indent)
 {
     for (int i = 0; i != indent; ++i)
         ts << "  ";
 }
 
-}
+} // namespace blink