Add more missing closing namespace comments.

third_party/WebKit/Source/core/html/parser/BackgroundHTMLInputStream.h

 /*
  * Copyright (C) 2013 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 62 matching lines @@
     Vector<Checkpoint> m_checkpoints;
 
     // Note: These indicies may === vector.size(), in which case there are no valid checkpoints/segments at this time.
     size_t m_firstValidCheckpointIndex;
     size_t m_firstValidSegmentIndex;
     size_t m_totalCheckpointTokenCount;
 
     void updateTotalCheckpointTokenCount();
 };
 
-}
+} // namespace blink
 
 #endif