Add more missing closing namespace comments.

third_party/WebKit/Source/platform/mhtml/ArchiveResource.cpp

 /*
  * Copyright (C) 2008, 2010 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 56 matching lines @@
     if (response.isNull()) {
         const ResourceResponse& resourceResponse = ResourceResponse(
             url, mimeType, data->size(), textEncoding, String());
         return adoptRefWillBeNoop(new ArchiveResource(
             data, url, contentID, mimeType, textEncoding, frameName, resourceResponse));
     }
     return adoptRefWillBeNoop(new ArchiveResource(
         data, url, contentID, mimeType, textEncoding, frameName, response));
 }
 
-}
+} // namespace blink