Add policies to control power management on the Chrome OS login screen

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 "base/callback.h"
 #include "base/logging.h"
@@ skipping 612 matching lines @@
   if (policy.has_attestation_settings()) {
     if (policy.attestation_settings().has_attestation_enabled()) {
       policies->Set(key::kAttestationEnabledForDevice,
                     POLICY_LEVEL_MANDATORY,
                     POLICY_SCOPE_MACHINE,
                     Value::CreateBooleanValue(
                         policy.attestation_settings().attestation_enabled()),
                     NULL);
     }
   }
+
+  if (policy.has_login_screen_power_management()) {
+    const em::LoginScreenPowerManagementProto& container(
+        policy.login_screen_power_management());
+    if (container.has_login_screen_power_management()) {
+      policies->Set(key::kDeviceLoginScreenPowerManagement,
+                    POLICY_LEVEL_MANDATORY,
+                    POLICY_SCOPE_MACHINE,
+                    Value::CreateStringValue(
+                        container.login_screen_power_management()),
+                    NULL);
+    }
+  }
 }
 
 }  // namespace
 
 void DecodeDevicePolicy(const em::ChromeDeviceSettingsProto& policy,
                         PolicyMap* policies,
                         EnterpriseInstallAttributes* install_attributes) {
   // 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