Creates BackgroundShell and uses it in test

components/web_view/test_runner/BUILD.gn

 # Copyright 2015 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("//mojo/public/mojo_application.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 executable("test_runner") {
   output_name = "layout_test_runner"
   testonly = true
 
   sources = [
     "launcher.cc",
     "launcher.h",
     "main.cc",
     "register_local_aliases.cc",
   ]
 
   deps = [
     "//base",
+    "//base:i18n",
     "//build/config/sanitizers:deps",
     "//mojo/common",
     "//mojo/environment:chromium",
     "//mojo/shell/runner/host:lib",
     "//mojo/shell/standalone:lib",
     "//mojo/shell/standalone:register_local_aliases_fwd",
     "//url",
   ]
 
   data_deps = [
@@ skipping 27 matching lines @@
     "//components/web_view/public/cpp",
     "//components/web_view/public/interfaces",
     "//components/web_view/test_runner/public/interfaces",
     "//mojo/common",
     "//mojo/converters/geometry",
     "//mojo/shell/public/cpp",
     "//ui/gfx/geometry",
     "//url",
   ]
 }