Add policy domain for signin screen apps

chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.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/chromeos/policy/user_cloud_policy_manager_chromeos.h"
 
 #include <set>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 117 matching lines @@
   DCHECK(local_state);
   local_state_ = local_state;
   // Note: |system_request_context| can be null for tests.
   // Use the system request context here instead of a context derived
   // from the Profile because Connect() is called before the profile is
   // fully initialized (required so we can perform the initial policy load).
   std::unique_ptr<CloudPolicyClient> cloud_policy_client(new CloudPolicyClient(
       std::string(), std::string(), kPolicyVerificationKeyHash,
       device_management_service, system_request_context,
       nullptr /* signing_service */));
-  CreateComponentCloudPolicyService(component_policy_cache_path_,
-                                    system_request_context,
-                                    cloud_policy_client.get());
+  CreateComponentCloudPolicyService(
+      dm_protocol::kChromeExtensionPolicyType, component_policy_cache_path_,
+      system_request_context, cloud_policy_client.get());
   core()->Connect(std::move(cloud_policy_client));
   client()->AddObserver(this);
 
   external_data_manager_->Connect(system_request_context);
 
   // Determine the next step after the CloudPolicyService initializes.
   if (service()->IsInitializationComplete()) {
     OnInitializationCompleted(service());
   } else {
     service()->AddObserver(this);
@@ skipping 298 matching lines @@
     // OnComponentCloudPolicyUpdated() once it's ready.
     return;
   }
 
   core()->StartRefreshScheduler();
   core()->TrackRefreshDelayPref(local_state_,
                                 policy_prefs::kUserPolicyRefreshRate);
 }
 
 }  // namespace policy