ChromeOS: Add SystemTimezoneAutomaticDetection policy.

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

 // Copyright 2013 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 669 matching lines @@
 // The list is used by the permission_broker daemon.
 message UsbDetachableWhitelistProto {
   repeated UsbDeviceIdProto id = 1;
 }
 
 message AllowBluetoothProto {
   // Policy which controls whether Bluetooth is available.
   optional bool allow_bluetooth = 1 [default = true];
 }
 
+message SystemTimezoneAutomaticDetectionProto {

[cschuet (SLOW), 2016/03/30 13:08:48]

Rather than creating a new submessage for just this policy stick it into the
existing SystemTimezoneProto message.

[Alexander Alekseev, 2016/03/31 06:51:49]

I will try, but this seems to be tricky.
SystemTimezone is not mapped to any Local State preference.
It was implemented before automatic mappings were implemented.
We also do not have any tests for SystemTimezone.

+  // This allows domain administrators to control the timezone settings for
+  // their devices.
+  enum AutomaticTimezoneDetectionType {
+    USERS_DECIDE = 0;
+    DISABLED = 1;
+    IP_ONLY = 2;
+    SEND_WIFI_ACCESS_POINTS = 3;
+    SEND_WIFI_ACCESS_POINTS_TEST = 4;
+  };
+
+  optional AutomaticTimezoneDetectionType timezone_detection_type = 1;
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
   optional GuestModeEnabledProto guest_mode_enabled = 3;
   optional OBSOLETE_DeviceProxySettingsProto device_proxy_settings = 4
       [deprecated = true];
   optional CameraEnabledProto camera_enabled = 5;
   optional ShowUserNamesOnSigninProto show_user_names = 6;
   optional DataRoamingEnabledProto data_roaming_enabled = 7;
   optional AllowNewUsersProto allow_new_users = 8;
@@ skipping 29 matching lines @@
   optional ExtensionCacheSizeProto extension_cache_size = 36;
   optional LoginScreenDomainAutoCompleteProto
       login_screen_domain_auto_complete = 37;
   optional DeviceLogUploadSettingsProto device_log_upload_settings = 38;
   optional DisplayRotationDefaultProto display_rotation_default = 39;
   optional AllowKioskAppControlChromeVersionProto
       allow_kiosk_app_control_chrome_version = 40;
   optional LoginAuthenticationBehaviorProto login_authentication_behavior = 41;
   optional UsbDetachableWhitelistProto usb_detachable_whitelist = 42;
   optional AllowBluetoothProto allow_bluetooth = 43;
+  optional SystemTimezoneAutomaticDetectionProto
+      system_timezone_automatic_detection = 44;
 }