Implement Chrome OS device enrollment on the new cloud policy stack.

chrome/browser/policy/browser_policy_connector.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/policy/browser_policy_connector.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 139 matching lines @@
 #if defined(OS_CHROMEOS)
   // Shutdown device cloud policy.
   if (device_cloud_policy_subsystem_)
     device_cloud_policy_subsystem_->Shutdown();
   // The AppPackUpdater may be observing the |device_cloud_policy_subsystem_|.
   // Delete it first.
   app_pack_updater_.reset();
   device_cloud_policy_subsystem_.reset();
   device_data_store_.reset();
 
-  device_cloud_policy_manager_->Shutdown();
+  if (device_cloud_policy_manager_)
+    device_cloud_policy_manager_->Shutdown();
 #endif
 
   // Shutdown user cloud policy.
   if (user_cloud_policy_subsystem_)
     user_cloud_policy_subsystem_->Shutdown();
   user_cloud_policy_subsystem_.reset();
   user_policy_token_cache_.reset();
   user_data_store_.reset();
 
   device_management_service_.reset();
@@ skipping 495 matching lines @@
     return new AsyncPolicyProvider(loader.Pass());
   } else {
     return NULL;
   }
 #else
   return NULL;
 #endif
 }
 
 }  // namespace policy