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 02a9b5bea6e7a75c0810cf9f73d8544e487fa73f..92eaea8198dd977e05be5b40a2d0458b98ef2d5f 100644
--- a/chromeos/dbus/fake_auth_policy_client.cc
+++ b/chromeos/dbus/fake_auth_policy_client.cc
@@ -15,6 +15,7 @@
 #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;
 
@@ -65,15 +66,14 @@ void FakeAuthPolicyClient::JoinAdDomain(const std::string& machine_name,
                                         const std::string& user_principal_name,
                                         int password_fd,
                                         const JoinCallback& callback) {
-  callback.Run(authpolicy::types::AD_JOIN_ERROR_NONE);
+  callback.Run(authpolicy::ERROR_NONE);
 }
 
 void FakeAuthPolicyClient::AuthenticateUser(
     const std::string& user_principal_name,
     int password_fd,
     const AuthCallback& callback) {
-  callback.Run(authpolicy::AUTH_USER_ERROR_NONE,
-               base::MD5String(user_principal_name));
+  callback.Run(authpolicy::ERROR_NONE, base::MD5String(user_principal_name));
 }
 
 void FakeAuthPolicyClient::RefreshDevicePolicy(