Add login screen locale and input method device policies

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 736 matching lines @@
   optional bool enabled = 1 [default = false];
   optional int32 upload_rate_kbits = 2 [default = 0];
   optional int32 download_rate_kbits = 3 [default = 0];
 }
 
 // A list of app-ids to install from the webstore on the login page.
 message LoginAppsProto {
   repeated string login_apps = 1;
 }
 
+// A list of allowed locales on the login page.

[Thiemo Nagel, 2017/02/13 11:33:20]

Nit: login screen

[pmarko, 2017/02/13 17:50:31]

You're right. Mini-CL to correct this:
https://codereview.chromium.org/2694833002 .

+message LoginScreenLocalesProto {
+  repeated string login_screen_locales = 1;
+}
+
+// A list of allowed input methods on the login page.

[Thiemo Nagel, 2017/02/13 11:33:20]

Nit: login screen

[pmarko, 2017/02/13 17:50:31]

See above.

+message LoginScreenInputMethodsProto {
+  repeated string login_screen_input_methods = 1;
+}
+
 // The url and hash that specified in JSON format that can be used to set the
 // device-level wallpaper on the login screen before any user logs in.
 message DeviceWallpaperImageProto {
   optional string device_wallpaper_image = 1;
 }
 
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
   optional GuestModeEnabledProto guest_mode_enabled = 3;
@@ skipping 41 matching lines @@
       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 DeviceQuirksDownloadEnabledProto quirks_download_enabled = 44;
   optional LoginVideoCaptureAllowedUrlsProto login_video_capture_allowed_urls =
       45;
   optional LoginAppsProto login_apps = 46;
   optional NetworkThrottlingEnabledProto network_throttling = 47;
   optional DeviceWallpaperImageProto device_wallpaper_image = 48;
+  optional LoginScreenLocalesProto login_screen_locales = 49;
+  optional LoginScreenInputMethodsProto login_screen_input_methods = 50;
 }