cros: Break BaseScreenHandler into two classes.

chrome/browser/ui/webui/chromeos/login/auto_enrollment_check_screen_handler.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 "chrome/browser/ui/webui/chromeos/login/auto_enrollment_check_screen_handler.h"
 
 #include "chrome/browser/chromeos/login/oobe_screen.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/login/localized_values_builder.h"
 
 namespace {
 
 const char kJsScreenPath[] = "login.AutoEnrollmentCheckScreen";
 
 }  // namespace
 
 namespace chromeos {
 
-AutoEnrollmentCheckScreenHandler::AutoEnrollmentCheckScreenHandler() {
+AutoEnrollmentCheckScreenHandler::AutoEnrollmentCheckScreenHandler()
+    : BaseScreenHandler(kScreenId) {
   set_call_js_prefix(kJsScreenPath);
 }
 
 AutoEnrollmentCheckScreenHandler::~AutoEnrollmentCheckScreenHandler() {
   if (delegate_)
     delegate_->OnViewDestroyed(this);
 }
 
 void AutoEnrollmentCheckScreenHandler::Show() {
   if (!page_is_ready()) {
     show_on_init_ = true;
     return;
   }
-  ShowScreen(OobeScreen::SCREEN_AUTO_ENROLLMENT_CHECK);
+  ShowScreen(kScreenId);
 }
 
 void AutoEnrollmentCheckScreenHandler::SetDelegate(Delegate* delegate) {
   delegate_ = delegate;
   if (page_is_ready())
     Initialize();
 }
 
 void AutoEnrollmentCheckScreenHandler::DeclareLocalizedValues(
     ::login::LocalizedValuesBuilder* builder) {
   builder->Add("autoEnrollmentCheckScreenHeader",
                IDS_AUTO_ENROLLMENT_CHECK_SCREEN_HEADER);
   builder->Add("autoEnrollmentCheckMessage",
                IDS_AUTO_ENROLLMENT_CHECK_SCREEN_MESSAGE);
 }
 
 void AutoEnrollmentCheckScreenHandler::Initialize() {
   if (!page_is_ready() || !delegate_)
     return;
 
   if (show_on_init_) {
     Show();
     show_on_init_ = false;
   }
 }
 
 void AutoEnrollmentCheckScreenHandler::RegisterMessages() {}
 
 }  // namespace chromeos