Add ArcEnabled policy implementation

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/chrome_tests.gni")
@@ skipping 1028 matching lines @@
         "../browser/ui/panels/panel_extension_browsertest.cc",
 
         # inline login UI is disabled on chromeos
         "../browser/ui/webui/signin/inline_login_ui_browsertest.cc",
 
         # chromeos does not use the desktop user manager
         "../browser/ui/webui/signin/user_manager_ui_browsertest.cc",
       ]
       deps += [
         "//chromeos/ime:gencode",
+        "//components/arc:arc_test_support",
         "//components/user_manager:test_support",
         "//dbus",
         "//dbus:test_support",
         "//ui/login:resources",
       ]
     } else {
       sources -= [
         "../browser/extensions/api/enterprise_device_attributes/enterprise_device_attributes_apitest.cc",
         "../browser/extensions/api/enterprise_platform_keys/enterprise_platform_keys_apitest_nss.cc",
         "../browser/extensions/api/platform_keys/platform_keys_apitest_nss.cc",
@@ skipping 1181 matching lines @@
 if (is_android) {
   android_library("unit_tests_java") {
     DEPRECATED_java_in_dir = "//chrome/test/android/unit_tests_apk/src"
     deps = [
       "//base:base_java",
       "//chrome/android:chrome_java",
       "//content/public/android:content_java",
     ]
   }
 }