Make the kiosk code not depend on Ash in Athena

chrome/browser/chromeos/login/session/login_oobe_session_manager_delegate.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/session/login_oobe_session_manager_delegate.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part_chromeos.h"
-#include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h"
 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_settings.h"
 #include "chrome/browser/chromeos/login/login_wizard.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/common/pref_names.h"
 
+#if !defined(USE_ATHENA)
+#include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h"
+#endif
+
 namespace chromeos {
 
 LoginOobeSessionManagerDelegate::LoginOobeSessionManagerDelegate() {
 }
 
 LoginOobeSessionManagerDelegate::~LoginOobeSessionManagerDelegate() {
 }
 
 void LoginOobeSessionManagerDelegate::Start() {
   // State will be defined once out-of-box/login branching is complete.
   ShowLoginWizard(std::string());
 
+#if !defined(USE_ATHENA)
   if (KioskModeSettings::Get()->IsKioskModeEnabled())
     InitializeKioskModeScreensaver();
+#endif
 
   // Reset reboot after update flag when login screen is shown.
   policy::BrowserPolicyConnectorChromeOS* connector =
       g_browser_process->platform_part()->browser_policy_connector_chromeos();
   if (!connector->IsEnterpriseManaged()) {
     PrefService* local_state = g_browser_process->local_state();
     local_state->ClearPref(prefs::kRebootAfterUpdate);
   }
 }
 
 }  // namespace chromeos