Add policy domain for signin screen apps

components/policy/core/common/cloud/cloud_policy_constants.h

 // 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.
 
 #ifndef COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_CONSTANTS_H_
 #define COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_CONSTANTS_H_
 
 #include <string>
 
 #include "components/policy/policy_export.h"
@@ skipping 35 matching lines @@
 POLICY_EXPORT extern const char kValueRequestDeviceAttributeUpdate[];
 POLICY_EXPORT extern const char kValueRequestGcmIdUpdate[];
 POLICY_EXPORT extern const char kValueRequestCheckAndroidManagement[];
 POLICY_EXPORT extern const char kValueRequestCertBasedRegister[];
 
 // Policy type strings for the policy_type field in PolicyFetchRequest.
 POLICY_EXPORT extern const char kChromeDevicePolicyType[];
 POLICY_EXPORT extern const char kChromeUserPolicyType[];
 POLICY_EXPORT extern const char kChromePublicAccountPolicyType[];
 POLICY_EXPORT extern const char kChromeExtensionPolicyType[];
+POLICY_EXPORT extern const char kChromeSigninExtensionPolicyType[];
 
 // These codes are sent in the |error_code| field of PolicyFetchResponse.
 enum PolicyFetchStatus {
   POLICY_FETCH_SUCCESS = 200,
   POLICY_FETCH_ERROR_NOT_FOUND = 902,
 };
 
 }  // namespace dm_protocol
 
 // The header used to transmit the policy ID for this client.
@@ skipping 63 matching lines @@
                                    // appropriate action (currently, launching
                                    // offline demo mode).
   DEVICE_MODE_CONSUMER_KIOSK_AUTOLAUNCH,  // The device is locally owned as
                                           // consumer kiosk with ability to auto
                                           // launch a kiosk webapp.
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_CLOUD_POLICY_CONSTANTS_H_