Add more missing closing namespace comments.

third_party/WebKit/Source/core/html/parser/HTMLParserOptions.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 24 matching lines @@
 
 class CORE_EXPORT HTMLParserOptions {
     DISALLOW_NEW();
 public:
     bool scriptEnabled;
     bool pluginsEnabled;
 
     explicit HTMLParserOptions(Document* = 0);
 };
 
-}
+} // namespace blink
 
 #endif