[ObjC ARC] Converts ios/chrome/browser/passwords:passwords_generation_utils to ARC.Automatically …

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 = [
     "credential_manager.h",
     "credential_manager.mm",
@@ skipping 64 matching lines @@
     "//url",
   ]
   public_deps = [
     ":passwords_generation_utils",
   ]
 
   allow_circular_includes_from = [ ":passwords_generation_utils" ]
 }
 
 source_set("passwords_generation_utils") {
+  configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "password_generation_utils.h",
     "password_generation_utils.mm",
   ]
   deps = [
     "//base:i18n",
     "//ios/chrome/browser/ui",
   ]
   libs = [ "CoreGraphics.framework" ]
 }
@@ skipping 34 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/credential_manager.js",
     "resources/password_controller.js",
   ]
 }