Added policy for disabling locally managed users.
By default LMU disabled for managed devices.

Also added support of new policy in ChromeOS part.

BUG=229298

Review URL: https://chromiumcodereview.appspot.com/17546004

git-svn-id: http://src.chromium.org/svn/trunk/src/chrome/browser/policy/proto@207978 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
diff --git a/chromeos/chrome_device_policy.proto b/chromeos/chrome_device_policy.proto
index 2ba6519..65fe798 100644
--- a/chromeos/chrome_device_policy.proto
+++ b/chromeos/chrome_device_policy.proto
@@ -408,6 +408,11 @@
   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 ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
@@ -436,4 +441,5 @@
   optional VariationsParameterProto variations_parameter = 25;
   optional AttestationSettingsProto attestation_settings = 26;
   optional AccessibilitySettingsProto accessibility_settings = 27;
+  optional SupervisedUsersSettingsProto supervised_users_settings = 28;
 }