[ObjC ARC] Converts ios/chrome/browser/ui/autofill:autofill to ARC.

ios/chrome/browser/ui/autofill/autofill_client_ios.mm

 // Copyright 2013 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/chrome/browser/ui/autofill/autofill_client_ios.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
@@ skipping 10 matching lines @@
 #include "components/prefs/pref_service.h"
 #include "google_apis/gaia/identity_provider.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/autofill/personal_data_manager_factory.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/infobars/infobar_utils.h"
 #include "ios/chrome/browser/ui/autofill/card_unmask_prompt_view_bridge.h"
 #include "ios/chrome/browser/web_data_service_factory.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace autofill {
 
 AutofillClientIOS::AutofillClientIOS(
     ios::ChromeBrowserState* browser_state,
     infobars::InfoBarManager* infobar_manager,
     id<AutofillClientIOSBridge> bridge,
     password_manager::PasswordGenerationManager* password_generation_manager,
     std::unique_ptr<IdentityProvider> identity_provider)
     : browser_state_(browser_state),
       infobar_manager_(infobar_manager),
@@ skipping 156 matching lines @@
 
 void AutofillClientIOS::StartSigninFlow() {
   NOTIMPLEMENTED();
 }
 
 void AutofillClientIOS::ShowHttpNotSecureExplanation() {
   NOTIMPLEMENTED();
 }
 
 }  // namespace autofill