Introduce a device setting controlling allowed connection types for AU.

chrome/browser/policy/device_policy_cache.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 CHROME_BROWSER_POLICY_DEVICE_POLICY_CACHE_H_
 #define CHROME_BROWSER_POLICY_DEVICE_POLICY_CACHE_H_
 #pragma once
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/login/signed_settings.h"
@@ skipping 80 matching lines @@
       const enterprise_management::ChromeDeviceSettingsProto& policy,
       PolicyMap* policies,
       EnterpriseInstallAttributes* install_attributes);
   static void DecodeNetworkPolicies(
       const enterprise_management::ChromeDeviceSettingsProto& policy,
       PolicyMap* policies,
       EnterpriseInstallAttributes* install_attributes);
   static void DecodeReportingPolicies(
       const enterprise_management::ChromeDeviceSettingsProto& policy,
       PolicyMap* policies);
+  static void DecodeAutoUpdatePolicies(
+      const enterprise_management::ChromeDeviceSettingsProto& policy,
+      PolicyMap* policies);
   static void DecodeGenericPolicies(
       const enterprise_management::ChromeDeviceSettingsProto& policy,
       PolicyMap* policies);
 
   CloudPolicyDataStore* data_store_;
   EnterpriseInstallAttributes* install_attributes_;
 
   chromeos::SignedSettingsHelper* signed_settings_helper_;
 
   base::WeakPtrFactory<DevicePolicyCache> weak_ptr_factory_;
 
   bool policy_fetch_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(DevicePolicyCache);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_DEVICE_POLICY_CACHE_H_