Fix crash in EnrollmentScreenHandler for Active Directory devices.

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

 // Copyright (c) 2012 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/enrollment_screen_handler.h"
 
 #include <algorithm>
 
 #include "ash/common/system/chromeos/devicetype_utils.h"
 #include "base/bind.h"
@@ skipping 669 matching lines @@
 void EnrollmentScreenHandler::DoShow() {
   base::DictionaryValue screen_data;
   screen_data.SetString("gaiaUrl", GaiaUrls::GetInstance()->gaia_url().spec());
   screen_data.SetString("clientId",
                         GaiaUrls::GetInstance()->oauth2_chrome_client_id());
   screen_data.SetString("enrollment_mode",
                         EnrollmentModeToUIMode(config_.mode));
   screen_data.SetBoolean("attestationBased", config_.is_mode_attestation());
   screen_data.SetString("management_domain", config_.management_domain);
 
-  const bool cfm = g_browser_process->platform_part()
-                       ->browser_policy_connector_chromeos()
-                       ->GetDeviceCloudPolicyManager()
-                       ->IsRemoraRequisition();
+  policy::DeviceCloudPolicyManagerChromeOS* policy_manager =
+      g_browser_process->platform_part()
+          ->browser_policy_connector_chromeos()
+          ->GetDeviceCloudPolicyManager();
+  const bool cfm = policy_manager && policy_manager->IsRemoraRequisition();
   screen_data.SetString("flow", cfm ? "cfm" : "enterprise");
 
   ShowScreenWithData(OobeScreen::SCREEN_OOBE_ENROLLMENT, &screen_data);
   if (first_show_) {
     first_show_ = false;
     UpdateStateInternal(NetworkError::ERROR_REASON_UPDATE, true);
   }
   histogram_helper_->OnScreenShow();
 }
 
 }  // namespace chromeos