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

chrome/browser/policy/proto/chromeos/chrome_device_policy.proto

 // 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package enterprise_management;
 
@@ skipping 396 matching lines @@
   // enable or disable the screen magnifier anytime and its status on the login
   // screen is persisted between users.
   optional ScreenMagnifierType login_screen_default_screen_magnifier_type = 4;
 }
 
 message SupervisedUsersSettingsProto {
   // Defines whether supervised users can be created on the device.
   optional bool supervised_users_enabled = 1;
 }
 
+message LoginScreenPowerManagementProto {
+  // Configures power management on the login screen. The policy should be
+  // specified as a string that expresses the individual settings in JSON
+  // format, conforming to the following schema:
+  // {
+  //   "type": "object",
+  //   "properties": {
+  //     "AC": {
+  //       "description": "Power management settings applicable only when
+  //                       running on AC power",
+  //       "type": "object",
+  //       "properties": {
+  //         "Delays": {
+  //           "type": "object",
+  //           "properties": {
+  //             "ScreenDim": {
+  //               "description": "The length of time without user input after
+  //                               which the screen is dimmed, in milliseconds",
+  //               "type": "integer",
+  //               "minimum": 0
+  //             },
+  //             "ScreenOff": {
+  //               "description": "The length of time without user input after
+  //                               which the screen is turned off, in
+  //                               milliseconds",
+  //               "type": "integer",
+  //               "minimum": 0
+  //             },
+  //             "Idle": {
+  //               "description": "The length of time without user input after
+  //                               which the idle action is taken, in
+  //                               milliseconds",
+  //               "type": "integer",
+  //               "minimum": 0
+  //             }
+  //           }
+  //         },
+  //         "IdleAction": {
+  //           "description": "Action to take when the idle delay is reached",
+  //           "enum": [ "Suspend", "Shutdown", "DoNothing" ]
+  //         }
+  //       }
+  //     },
+  //     "Battery": {
+  //       "description": "Power management settings applicable only when
+  //                       running on battery power",
+  //       "type": "object",
+  //       "properties": {
+  //         "Delays": {
+  //           "type": "object",
+  //           "properties": {
+  //             "ScreenDim": {
+  //               "description": "The length of time without user input after
+  //                               which the screen is dimmed, in milliseconds",
+  //               "type": "integer",
+  //               "minimum": 0
+  //             },
+  //             "ScreenOff": {
+  //               "description": "The length of time without user input after
+  //                               which the screen is turned off, in
+  //                               milliseconds",
+  //               "type": "integer",
+  //               "minimum": 0
+  //             },
+  //             "Idle": {
+  //               "description": "The length of time without user input after
+  //                               which the idle action is taken, in
+  //                               milliseconds",
+  //               "type": "integer",
+  //               "minimum": 0
+  //             }
+  //           }
+  //         },
+  //         "IdleAction": {
+  //           "description": "Action to take when the idle delay is reached",
+  //           "enum": [ "Suspend", "Shutdown", "DoNothing" ]
+  //         }
+  //       }
+  //     },
+  //     "LidCloseAction": {
+  //       "description": "Action to take when the lid is closed",
+  //       "enum": [ "Suspend", "Shutdown", "DoNothing" ]
+  //     },
+  //     "UserActivityScreenDimDelayScale": {
+  //       "description": "Percentage by which the screen dim delay is scaled
+  //                       when user activity is observed while the screen is
+  //                       dimmed or soon after the screen has been turned off",
+  //       "type": "integer",
+  //       "minimum": 0
+  //     }
+  //   }
+  // }
+  optional string login_screen_power_management = 1;
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
   optional GuestModeEnabledProto guest_mode_enabled = 3;
   optional DeviceProxySettingsProto device_proxy_settings = 4;
   optional CameraEnabledProto camera_enabled = 5;
   optional ShowUserNamesOnSigninProto show_user_names = 6;
   optional DataRoamingEnabledProto data_roaming_enabled = 7;
   optional AllowNewUsersProto allow_new_users = 8;
   optional MetricsEnabledProto metrics_enabled = 9;
   optional ReleaseChannelProto release_channel = 10;
   optional DeviceOpenNetworkConfigurationProto open_network_configuration = 11;
   optional DeviceReportingProto device_reporting = 12;
   optional EphemeralUsersEnabledProto ephemeral_users_enabled = 13;
   optional AppPackProto app_pack = 14;
   optional ForcedLogoutTimeoutsProto forced_logout_timeouts = 15;
   optional ScreenSaverProto login_screen_saver = 16;
   optional AutoUpdateSettingsProto auto_update_settings = 17;
   optional StartUpUrlsProto start_up_urls = 18;
   optional PinnedAppsProto pinned_apps = 19;
   optional SystemTimezoneProto system_timezone = 20;
   optional DeviceLocalAccountsProto device_local_accounts = 21;
   optional AllowRedeemChromeOsRegistrationOffersProto allow_redeem_offers = 22;
   optional StartUpFlagsProto start_up_flags = 23;
   optional UptimeLimitProto uptime_limit = 24;
   optional VariationsParameterProto variations_parameter = 25;
   optional AttestationSettingsProto attestation_settings = 26;
   optional AccessibilitySettingsProto accessibility_settings = 27;
   optional SupervisedUsersSettingsProto supervised_users_settings = 28;
+  optional LoginScreenPowerManagementProto login_screen_power_management = 29;
 }