cros: Refactor of BaseScreen::GetName to BaseScreen::screen_id.

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

 // Copyright 2015 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/update_model.h"
 
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 
 namespace chromeos {
 
 const char UpdateModel::kUserActionCancelUpdateShortcut[] = "cancel-update";
 const char UpdateModel::kContextKeyEstimatedTimeLeftSec[] = "time-left-sec";
 const char UpdateModel::kContextKeyShowEstimatedTimeLeft[] = "show-time-left";
 const char UpdateModel::kContextKeyUpdateMessage[] = "update-msg";
 const char UpdateModel::kContextKeyShowCurtain[] = "show-curtain";
 const char UpdateModel::kContextKeyShowProgressMessage[] = "show-progress-msg";
 const char UpdateModel::kContextKeyProgress[] = "progress";
 const char UpdateModel::kContextKeyProgressMessage[] = "progress-msg";
 const char UpdateModel::kContextKeyCancelUpdateShortcutEnabled[] =
     "cancel-update-enabled";
 
 UpdateModel::UpdateModel(BaseScreenDelegate* base_screen_delegate)
-    : BaseScreen(base_screen_delegate) {
-}
+    : BaseScreen(base_screen_delegate, WizardController::kUpdateScreenName) {}
 
-UpdateModel::~UpdateModel() {
-}
-
-std::string UpdateModel::GetName() const {
-  return WizardController::kUpdateScreenName;
-}
+UpdateModel::~UpdateModel() {}
 
 }  // namespace chromeos