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

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

Index: chrome/browser/policy/proto/chromeos/chrome_device_policy.proto
diff --git a/chrome/browser/policy/proto/chromeos/chrome_device_policy.proto b/chrome/browser/policy/proto/chromeos/chrome_device_policy.proto
index 65fe798869d85eab827cf573da5d429538554d75..81e219fea01fb58b01bd8e9d85fa62bcd5dff067 100644
--- a/chrome/browser/policy/proto/chromeos/chrome_device_policy.proto
+++ b/chrome/browser/policy/proto/chromeos/chrome_device_policy.proto
@@ -413,6 +413,84 @@ message SupervisedUsersSettingsProto {
   optional bool supervised_users_enabled = 1;
 }
 
+message PowerManagementProto {
+  // Specifies the length of time without user activity after which the screen
+  // is dimmed when the login screen is being shown and the device is running on
+  // AC power. When this policy is set to zero, the screen is never dimmed. When
+  // this policy is unset, a default length of time is used. The policy value
+  // should be specified in milliseconds. Values are clamped to be less than or
+  // equal the screen off delay (if set) and the idle delay.
+  optional int64 login_screen_screen_dim_delay_ac = 1;
+
+  // Specifies the length of time without user activity after which the screen
+  // is turned off when the login screen is being shown and the device is
+  // running on AC power. When this policy is set to zero, the screen is never
+  // turned off. When this policy is unset, a default length of time is used.
+  // The policy value should be specified in milliseconds. Values are clamped to
+  // be less than or equal the idle delay.
+  optional int64 login_screen_screen_off_delay_ac = 2;
+
+  // Specifies the length of time without user activity after which the idle
+  // action is taken when the login screen is being shown and the device is
+  // running on AC power. When this policy is unset, a default length of time is
+  // used. The policy value should be specified in milliseconds.
+  optional int64 login_screen_idle_delay_ac = 3;
+
+  // Specifies the length of time without user activity after which the screen
+  // is dimmed when the login screen is being shown and the device is running on
+  // battery power. When this policy is set to zero, the screen is never dimmed.
+  // When this policy is unset, a default length of time is used. The policy
+  // value should be specified in milliseconds. Values are clamped to be less
+  // than or equal the screen off delay (if set) and the idle delay.
+  optional int64 login_screen_screen_dim_delay_battery = 4;
+
+  // Specifies the length of time without user activity after which the screen
+  // is turned off when the login screen is being shown and the device is
+  // running on battery power. When this policy is set to zero, the screen is
+  // never turned off. When this policy is unset, a default length of time is
+  // used. The policy value should be specified in milliseconds. Values are
+  // clamped to be less than or equal the idle delay.
+  optional int64 login_screen_screen_off_delay_battery = 5;
+
+  // Specifies the length of time without user activity after which the idle
+  // action is taken when the login screen is being shown and the device is
+  // running on battery power. When this policy is unset, a default length of
+  // time is used. The policy value should be specified in milliseconds.
+  optional int64 login_screen_idle_delay_battery = 6;
+
+  // Enumerates the power management actions possible on the login screen.
+  enum PowerManagementAction {
+    // Suspend the device.
+    ACTION_SUSPEND = 0;
+    // Shut down the device.
+    ACTION_SHUT_DOWN = 2;
+    // Do nothing.
+    ACTION_DO_NOTHING = 3;
+  };
+
+  // Specifies the action to take when the idle delay is reached while the login
+  // screen is being shown and the device is running on AC power. When this
+  // policy is unset, the default action is taken, which is suspend.
+  optional PowerManagementAction login_screen_idle_action_ac = 7;
+
+  // Specifies the action to take when the idle delay is reached while the login
+  // screen is being shown and the device is running on battery power. When this
+  // policy is unset, the default action is taken, which is shut down.
+  optional PowerManagementAction login_screen_idle_action_battery = 8;
+
+  // Specifies the action to take when the user closes the lid while the login
+  // screen is being shown. When this policy is unset, the default action is
+  // taken, which is shut down.
+  optional PowerManagementAction login_screen_lid_close_action = 9;
+
+  // Specifies the 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 while the login screen is being shown. If this policy
+  // is unset, a default scale factor is used. The policy value is specified in
+  // percent and must be at least 100.
+  optional int64 login_screen_user_activity_screen_dim_delay_scale = 10;
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
@@ -442,4 +520,5 @@ message ChromeDeviceSettingsProto {
   optional AttestationSettingsProto attestation_settings = 26;
   optional AccessibilitySettingsProto accessibility_settings = 27;
   optional SupervisedUsersSettingsProto supervised_users_settings = 28;
+  optional PowerManagementProto power_management = 29;
 }