Remove retail mode.

chromeos/login/user_names.cc

 // 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.
 #include "chromeos/login/user_names.h"
 
 #include "google_apis/gaia/gaia_auth_util.h"
 
 namespace chromeos {
 
 namespace login {
 
 const char* kStubUser = "stub-user@example.com";
 
 const char* kSignInUser = "sign-in-user-id";
 
 // Should match cros constant in platform/libchromeos/chromeos/cryptohome.h
 const char* kGuestUserName = "$guest";
 
 const char* kSupervisedUserDomain = "locally-managed.localhost";
 
-const char* kRetailModeUserName = "demouser@";
-
 std::string CanonicalizeUserID(const std::string& user_id) {
   if (user_id == chromeos::login::kGuestUserName)
     return user_id;
   return gaia::CanonicalizeEmail(user_id);
 }
 
 }  // namespace login
 
 }  // namespace chromeos