[ObjC ARC] Converts ios/chrome/browser:browser_impl to ARC.Automatically generated ARCMigrate com…

ios/chrome/browser/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("//build/config/features.gni")
 import("//third_party/protobuf/proto_library.gni")
 
 declare_args() {
   google_test_gaia_client_id = ""
   google_test_gaia_client_secret = ""
@@ skipping 97 matching lines @@
     "//url",
   ]
   allow_circular_includes_from = [
     "//ios/chrome/browser/sync/glue",
     "//ios/chrome/browser/browser_state",
   ]
   libs = [ "UIKit.framework" ]
 }
 
 source_set("browser_impl") {
+  configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
     "application_context_impl.cc",
     "application_context_impl.h",
     "ios_chrome_main_parts.h",
     "ios_chrome_main_parts.mm",
   ]
   deps = [
     ":about_flags",
     ":browser",
     "//base",
@@ skipping 103 matching lines @@
     "//components/proxy_config",
     "//components/ssl_config",
     "//components/variations",
     "//ios/web:test_support",
     "//net",
     "//net:test_support",
     "//testing/gtest",
     "//url",
   ]
 }