Add resource strings to Showcase

ios/showcase/core/resources/BUILD.gn

Index: ios/showcase/core/resources/BUILD.gn
diff --git a/ios/showcase/core/resources/BUILD.gn b/ios/showcase/core/resources/BUILD.gn
index 5614cdadc8e305d223b31423448e15965aa76ff5..62cbe01cbc82b7da384a80156349d5d870065952 100644
--- a/ios/showcase/core/resources/BUILD.gn
+++ b/ios/showcase/core/resources/BUILD.gn
@@ -3,11 +3,14 @@
 # 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",
   ]
 }
 
@@ -31,3 +34,9 @@ bundle_data("icons") {
     "{{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
+}