Add more missing closing namespace comments.

third_party/WebKit/Source/core/html/parser/BackgroundHTMLParser.cpp

 /*
  * 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 284 matching lines @@
     bool isEmpty = m_parsedChunkQueue->enqueue(chunk.release());
     if (isEmpty) {
         m_loadingTaskRunner->postTask(
             BLINK_FROM_HERE,
             new Task(threadSafeBind(&HTMLDocumentParser::notifyPendingParsedChunks, AllowCrossThreadAccess(m_parser))));
     }
 
     m_pendingTokens = adoptPtr(new CompactHTMLTokenStream);
 }
 
-}
+} // namespace blink