Add policy domain for signin screen apps

components/policy/core/common/cloud/user_cloud_policy_manager.cc

Index: components/policy/core/common/cloud/user_cloud_policy_manager.cc
diff --git a/components/policy/core/common/cloud/user_cloud_policy_manager.cc b/components/policy/core/common/cloud/user_cloud_policy_manager.cc
index 0a0302f2eebb61cc0ca4db1730d057bcf64af541..ebf23c0abd2227072a530e66967d9ab12ef19577 100644
--- a/components/policy/core/common/cloud/user_cloud_policy_manager.cc
+++ b/components/policy/core/common/cloud/user_cloud_policy_manager.cc
@@ -56,8 +56,9 @@ void UserCloudPolicyManager::Connect(
     PrefService* local_state,
     scoped_refptr<net::URLRequestContextGetter> request_context,
     std::unique_ptr<CloudPolicyClient> client) {
-  CreateComponentCloudPolicyService(component_policy_cache_path_,
-                                    request_context, client.get());
+  CreateComponentCloudPolicyService(
+      dm_protocol::kChromeExtensionPolicyType, component_policy_cache_path_,
+      request_context, client.get());
   core()->Connect(std::move(client));
   core()->StartRefreshScheduler();
   core()->TrackRefreshDelayPref(local_state,