Move the supervised user error page to a component

components/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/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 if (is_android) {
@@ skipping 41 matching lines @@
     "//components/net_log:unit_tests",
     "//components/network_time:unit_tests",
     "//components/ntp_snippets:unit_tests",
     "//components/open_from_clipboard:unit_tests",
     "//components/os_crypt:unit_tests",
     "//components/prefs:unit_tests",
     "//components/proxy_config:unit_tests",
     "//components/security_state:unit_tests",
     "//components/sessions:unit_tests",
     "//components/suggestions:unit_tests",
+    "//components/supervised_user_error_page:unit_tests",
     "//components/syncable_prefs:unit_tests",
     "//components/translate/core/browser:unit_tests",
     "//components/translate/core/common:unit_tests",
     "//components/translate/core/language_detection:unit_tests",
     "//components/undo:unit_tests",
     "//components/update_client:unit_tests",
     "//components/upload_list:unit_tests",
     "//components/variations:unit_tests",
     "//components/variations/service:unit_tests",
     "//components/web_resource:unit_tests",
@@ skipping 363 matching lines @@
   if (!is_ios) {
     deps += [
       "//base",
       "//base/test:test_support_perf",
       "//components/scheduler",
       "//components/visitedlink/browser",
       "//content/test:test_support",
     ]
   }
 }