Removed old login screen from source.

chrome/browser/chromeos/login/screen_observer.h

 // Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_OBSERVER_H_
 #pragma once
 
 #include <string>
 
 namespace chromeos {
 
 // Interface that handles notifications received from any of login wizard
 // screens.
 class ScreenObserver {
  public:
   // Each login screen or a view shown within login wizard view is itself a
   // state. Upon exit each view returns one of the results by calling
   // OnExit() method. Depending on the result and the current view or state
   // login wizard decides what is the next view to show. There must be an
   // exit code for each way to exit the screen for each screen.
   enum ExitCodes {
-    LOGIN_SIGN_IN_SELECTED,
-    LOGIN_GUEST_SELECTED,
-    LOGIN_CREATE_ACCOUNT,
     NETWORK_CONNECTED,
     NETWORK_OFFLINE,
     ACCOUNT_CREATE_BACK,
     ACCOUNT_CREATED,
     CONNECTION_FAILED,
     UPDATE_INSTALLED,
     UPDATE_NOUPDATE,
     UPDATE_ERROR_CHECKING_FOR_UPDATE,
     UPDATE_ERROR_UPDATING,
     USER_IMAGE_SELECTED,
@@ skipping 13 matching lines @@
   virtual void OnSetUserNamePassword(const std::string& username,
                                      const std::string& password) = 0;
 
  protected:
   virtual ~ScreenObserver() {}
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREEN_OBSERVER_H_