cros: Replace WizardController string constants with OobeScreen values.

chrome/browser/chromeos/login/screens/eula_model.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/chromeos/login/screens/eula_model.h"
 
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 
 namespace chromeos {
 
 const char EulaModel::kUserActionAcceptButtonClicked[] = "accept-button";
 const char EulaModel::kUserActionBackButtonClicked[] = "back-button";
 const char EulaModel::kContextKeyUsageStatsEnabled[] = "usageStatsEnabled";
 
 EulaModel::EulaModel(BaseScreenDelegate* base_screen_delegate)
-    : BaseScreen(base_screen_delegate, WizardController::kEulaScreenName) {}
+    : BaseScreen(base_screen_delegate, OobeScreen::SCREEN_OOBE_EULA) {}
 
-EulaModel::~EulaModel() {
-}
+EulaModel::~EulaModel() {}
 
 }  // namespace chromeos