Add more missing closing namespace comments.

third_party/WebKit/Source/platform/mhtml/ArchiveResourceCollection.h

 /*
  * Copyright (C) 2008 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
@@ skipping 46 matching lines @@
     DECLARE_TRACE();
 
 private:
     ArchiveResourceCollection();
     void addResource(ArchiveResource&);
 
     WillBeHeapHashMap<String, RefPtrWillBeMember<ArchiveResource>> m_subresources;
     WillBeHeapHashMap<String, RefPtrWillBeMember<MHTMLArchive>> m_subframes;
 };
 
-}
+} // namespace blink
 
 #endif