Add more missing closing namespace comments.

third_party/WebKit/Source/platform/SharedBufferChunkReader.h

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 54 matching lines @@
     SharedBuffer* m_buffer;
     size_t m_bufferPosition;
     const char* m_segment;
     size_t m_segmentLength;
     size_t m_segmentIndex;
     bool m_reachedEndOfFile;
     Vector<char> m_separator;
     size_t m_separatorIndex;
 };
 
-}
+} // namespace blink
 
 #endif