Extract LoginPerformer to chromeos/auth

chrome/browser/chromeos/login/screens/error_screen.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/login/screens/error_screen.h"
 
 #include "base/command_line.h"
+#include "chrome/browser/chromeos/login/auth/chrome_login_performer.h"
 #include "chrome/browser/chromeos/login/chrome_restart_request.h"
 #include "chrome/browser/chromeos/login/screens/error_screen_actor.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 
 namespace {
 void* const kCanaryConstant = (void*)0xbaddecafbaddecafLLU;
 }
 
@@ skipping 152 matching lines @@
       CrosSettings::Get()->GetBoolean(kAccountsPrefAllowGuest, &allow_guest);
       if (allow_guest)
         break;
       return;
     }
   }
 
   if (guest_login_performer_)
     return;
 
-  guest_login_performer_.reset(new LoginPerformer(this));
+  guest_login_performer_.reset(new ChromeLoginPerformer(this));
   guest_login_performer_->LoginOffTheRecord();
 }
 
 }  // namespace chromeos