cros: Replace WizardController string constants with OobeScreen values.

chrome/browser/ui/webui/chromeos/login/signin_screen_handler.cc

 // Copyright (c) 2013 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/signin_screen_handler.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <vector>
@@ skipping 1109 matching lines @@
   if (delegate_)
     delegate_->Login(context, SigninSpecifics());
 }
 
 void SigninScreenHandler::HandleShowSupervisedUserCreationScreen() {
   if (!user_manager::UserManager::Get()->AreSupervisedUsersAllowed()) {
     LOG(ERROR) << "Managed users not allowed.";
     return;
   }
   LoginDisplayHost::default_host()->StartWizard(
-      WizardController::kSupervisedUserCreationScreenName);
+      OobeScreen::SCREEN_CREATE_SUPERVISED_USER_FLOW);
 }
 
 void SigninScreenHandler::HandleLaunchPublicSession(
     const AccountId& account_id,
     const std::string& locale,
     const std::string& input_method) {
   if (!delegate_)
     return;
 
   UserContext context(user_manager::USER_TYPE_PUBLIC_ACCOUNT, account_id);
@@ skipping 401 matching lines @@
 }
 
 void SigninScreenHandler::OnFeedbackFinished() {
   CallJS("login.UnrecoverableCryptohomeErrorScreen.resumeAfterFeedbackUI");
 
   // Recreate user's cryptohome after the feedback is attempted.
   HandleResyncUserData();
 }
 
 }  // namespace chromeos