Chromad: Switch AuthPolicyClient to use cros_system_api enums.

chromeos/dbus/fake_auth_policy_client.cc

Index: chromeos/dbus/fake_auth_policy_client.cc
diff --git a/chromeos/dbus/fake_auth_policy_client.cc b/chromeos/dbus/fake_auth_policy_client.cc
index aaaa9b72d7ef785908f9e5c9e60bb328f9db10ae..69227547cf146d6d3447c752fae06b79389b7c81 100644
--- a/chromeos/dbus/fake_auth_policy_client.cc
+++ b/chromeos/dbus/fake_auth_policy_client.cc
@@ -14,6 +14,7 @@
 #include "chrome/browser/chromeos/policy/proto/chrome_device_policy.pb.h"
 #include "chromeos/chromeos_paths.h"
 #include "components/policy/proto/device_management_backend.pb.h"
+#include "third_party/cros_system_api/dbus/service_constants.h"
 
 namespace em = enterprise_management;
 
@@ -64,7 +65,7 @@ void FakeAuthPolicyClient::JoinAdDomain(const std::string& machine_name,
                                         const std::string& user,
                                         int password_fd,
                                         const JoinCallback& callback) {
-  callback.Run(authpolicy::types::AD_JOIN_ERROR_NONE);
+  callback.Run(authpolicy::AD_JOIN_ERROR_NONE);
 }
 
 void FakeAuthPolicyClient::RefreshDevicePolicy(