Remove retail mode.

chromeos/login/user_names.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMEOS_LOGIN_USER_NAMES_H_
 #define CHROMEOS_LOGIN_USER_NAMES_H_
 
 #include <string>
 
 #include "chromeos/chromeos_export.h"
@@ skipping 12 matching lines @@
 // Magic e-mail addresses are bad. They exist here because some code already
 // depends on them and it is hard to figure out what. Any user types added in
 // the future should be identified by a new |UserType|, not a new magic e-mail
 // address.
 // Username for Guest session user.
 CHROMEOS_EXPORT extern const char* kGuestUserName;
 
 // Domain that is used for all supervised users.
 CHROMEOS_EXPORT extern const char* kSupervisedUserDomain;
 
-// The retail mode user has a magic, domainless e-mail address.
-CHROMEOS_EXPORT extern const char* kRetailModeUserName;
-
 // Canonicalizes a GAIA user ID, accounting for the legacy guest mode user ID
 // which does trips up gaia::CanonicalizeEmail() because it does not contain an
 // @ symbol.
 CHROMEOS_EXPORT std::string CanonicalizeUserID(const std::string& user_id);
 
 }  // namespace login
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_LOGIN_USER_NAMES_H_