cros: Move BaseScreenDelegate::ExitCodes into separate file, ScreenExitCode.

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

 // Copyright (c) 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 "chrome/browser/chromeos/login/screens/reset_screen.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 126 matching lines @@
 }
 
 void ResetScreen::OnCancel() {
   if (context_.GetInteger(
       kContextKeyScreenState, STATE_RESTART_REQUIRED) == STATE_REVERT_PROMISE)
     return;
   // Hide Rollback view for the next show.
   if (context_.GetBoolean(kContextKeyIsRollbackAvailable) &&
       context_.GetBoolean(kContextKeyIsRollbackChecked))
     OnToggleRollback();
-  Finish(BaseScreenDelegate::RESET_CANCELED);
+  Finish(ScreenExitCode::RESET_CANCELED);
   DBusThreadManager::Get()->GetUpdateEngineClient()->RemoveObserver(this);
 }
 
 void ResetScreen::OnPowerwash() {
   if (context_.GetInteger(kContextKeyScreenState, 0) !=
       STATE_POWERWASH_PROPOSAL)
     return;
 
   GetContextEditor().SetBoolean(kContextKeyIsConfirmational, false);
   CommitContextChanges();
@@ skipping 99 matching lines @@
                             reset::DIALOG_VIEW_TYPE_SIZE);
 
   GetContextEditor().SetBoolean(kContextKeyIsRollbackAvailable, can_rollback);
 }
 
 ErrorScreen* ResetScreen::GetErrorScreen() {
   return get_base_screen_delegate()->GetErrorScreen();
 }
 
 }  // namespace chromeos