Add a device setting that indicates dev mode blocking status.

chrome/browser/chromeos/policy/device_policy_decoder_chromeos.cc

 // 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.
 
 #include "chrome/browser/chromeos/policy/device_policy_decoder_chromeos.h"
 
 #include <limits>
 #include <string>
 
 #include "base/callback.h"
@@ skipping 751 matching lines @@
           key::kDeviceLoginScreenPowerManagement);
       if (decoded_json) {
         policies->Set(key::kDeviceLoginScreenPowerManagement,
                       POLICY_LEVEL_MANDATORY,
                       POLICY_SCOPE_MACHINE,
                       decoded_json.release(),
                       NULL);
       }
     }
   }
+
+  if (policy.has_system_settings()) {
+    const em::SystemSettingsProto& container(policy.system_settings());
+    if (container.has_block_devmode()) {
+      policies->Set(
+          key::kDeviceBlockDevmode,
+          POLICY_LEVEL_MANDATORY,
+          POLICY_SCOPE_MACHINE,
+          new base::FundamentalValue(container.block_devmode()),
+          NULL);
+    }
+  }
 }
 
 }  // namespace
 
 void DecodeDevicePolicy(const em::ChromeDeviceSettingsProto& policy,
                         PolicyMap* policies,
                         EnterpriseInstallAttributes* install_attributes) {
   // TODO(achuith): Remove this once crbug.com/263527 is resolved.
   VLOG(2) << "DecodeDevicePolicy " << policy.SerializeAsString();
 
   // Decode the various groups of policies.
   DecodeLoginPolicies(policy, policies);
   DecodeKioskPolicies(policy, policies, install_attributes);
   DecodeNetworkPolicies(policy, policies, install_attributes);
   DecodeReportingPolicies(policy, policies);
   DecodeAutoUpdatePolicies(policy, policies);
   DecodeAccessibilityPolicies(policy, policies);
   DecodeGenericPolicies(policy, policies);
 }
 
 }  // namespace policy