Convert some component source sets to static library

components/supervised_user_error_page/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.
 
-source_set("supervised_user_error_page") {
+static_library("supervised_user_error_page") {
   sources = [
     "supervised_user_error_page.cc",
     "supervised_user_error_page.h",
   ]
 
   deps = [
     "//base",
     "//components/resources",
     "//components/strings",
     "//ui/base",
   ]
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "supervised_user_error_page_unittest.cc",
   ]
   deps = [
     ":supervised_user_error_page",
     "//base",
     "//base/test:test_support",
     "//components/resources",
     "//components/strings",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/base",
   ]
 }