Disable supervised user creation when force sign in is enabled.

chrome/test/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 4833 matching lines @@
     sources += [
       "../browser/supervised_user/legacy/supervised_user_pref_mapping_service_unittest.cc",
       "../browser/supervised_user/legacy/supervised_user_refresh_token_fetcher_unittest.cc",
       "../browser/supervised_user/legacy/supervised_user_registration_utility_unittest.cc",
       "../browser/supervised_user/legacy/supervised_user_shared_settings_service_unittest.cc",
       "../browser/supervised_user/legacy/supervised_user_shared_settings_update_unittest.cc",
       "../browser/supervised_user/legacy/supervised_user_sync_service_unittest.cc",
     ]
   }
   if (enable_supervised_users && !is_android && !is_chromeos) {
-    sources += [ "../browser/ui/webui/signin/signin_supervised_user_import_handler_unittest.cc" ]
+    sources += [
+      "../browser/supervised_user/supervised_user_creation_policy_handler_unittest.cc",
+      "../browser/ui/webui/signin/signin_supervised_user_import_handler_unittest.cc",
+    ]
   }
   if (safe_browsing_mode == 1 && enable_extensions) {
     sources += [ "../browser/extensions/blacklist_unittest.cc" ]
   }
   if (enable_app_list) {
     sources += [
       "../browser/apps/drive/drive_app_mapping_unittest.cc",
       "../browser/ui/app_list/app_context_menu_unittest.cc",
       "../browser/ui/app_list/app_list_positioner_unittest.cc",
       "../browser/ui/app_list/app_list_service_unittest.cc",
@@ skipping 250 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }