Add resource strings to Showcase

ios/showcase/core/resources/BUILD.gn

 # Copyright 2017 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/ios/rules.gni")
+import("//build/config/locales.gni")
+import("//ios/chrome/app/resources/ios_chrome_repack.gni")
 
 group("resources") {
   public_deps = [
     ":icons",
     ":launchscreen_xib",
+    ":repack_locales",
   ]
 }
 
 bundle_data_ib_file("launchscreen_xib") {
   source = "LaunchScreen.storyboard"
 }
 
 bundle_data("icons") {
   sources = [
     "Icon-120.png",
     "Icon-152.png",
     "Icon-167.png",
     "Icon-180.png",
     "Icon-29.png",
     "Icon-58.png",
     "Icon-76.png",
     "Icon-80.png",
     "Icon-87.png",
   ]
   outputs = [
     "{{bundle_resources_dir}}/{{source_file_part}}",
   ]
 }
+
+ios_chrome_repack_locales("repack_locales") {
+  visibility = [ ":resources" ]
+  input_locales = ios_packed_locales
+  output_locales = ios_packed_locales_as_mac_outputs
+}