[ObjC ARC] Converts ios/chrome/browser/passwords:passwords_internal to ARC.

ios/chrome/browser/passwords/BUILD.gn

 # Copyright 2016 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("//ios/web/js_compile.gni")
 
 source_set("passwords") {
   sources = [
     "ios_chrome_password_manager_client.h",
     "ios_chrome_password_manager_client.mm",
@@ skipping 118 matching lines @@
 # TODO(crbug.com/487804): use js_compile_checked instead once the errors have
 # been fixed.
 js_compile_unchecked("injected_js") {
   visibility = [ ":passwords" ]
   sources = [
     "resources/password_controller.js",
   ]
 }
 
 source_set("passwords_internal") {
+  configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "password_generation_prompt_view.h",
     "password_generation_prompt_view.mm",
     "password_generation_prompt_view_controller.h",
     "password_generation_prompt_view_controller.mm",
     "passwords_ui_delegate_impl.h",
     "passwords_ui_delegate_impl.mm",
   ]
   deps = [
     ":passwords",
     "//base",
     "//components/strings",
     "//ios/chrome/app/strings",
     "//ios/chrome/app/theme",
     "//ios/chrome/browser/ui",
     "//ios/chrome/common",
     "//ios/third_party/material_components_ios",
     "//ios/third_party/material_roboto_font_loader_ios",
     "//ui/base",
   ]
   libs = [ "UIKit.framework" ]
 }