Add more missing closing namespace comments.

third_party/WebKit/Source/modules/geolocation/testing/GeolocationClientMock.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 79 matching lines @@
         PermissionStateAllowed,
         PermissionStateDenied
     };
 
     PermissionState m_permissionState;
 
     typedef PersistentHeapHashSetWillBeHeapHashSet<Member<Geolocation>> GeolocationSet;
     GeolocationSet m_pendingPermissions;
 };
 
-}
+} // namespace blink
 
 #endif