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

ios/chrome/browser/payments/payment_request.mm

 // Copyright 2017 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.
 
 #include "ios/chrome/browser/payments/payment_request.h"
 
 #include <unordered_set>
 
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_data_util.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
 #include "components/payments/currency_formatter.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/web/public/payments/payment_request.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 PaymentRequest::PaymentRequest(
     std::unique_ptr<web::PaymentRequest> web_payment_request,
     autofill::PersonalDataManager* personal_data_manager)
     : web_payment_request_(std::move(web_payment_request)),
       personal_data_manager_(personal_data_manager),
       selected_shipping_profile_(nullptr),
       selected_credit_card_(nullptr),
       selected_shipping_option_(nullptr) {
   PopulateProfileCache();
   PopulateCreditCardCache();
@@ skipping 70 matching lines @@
 
   selected_shipping_option_ = nullptr;
   for (const auto& shipping_option : shipping_options_) {
     if (shipping_option->selected) {
       // If more than one option has |selected| set, the last one in the
       // sequence should be treated as the selected item.
       selected_shipping_option_ = shipping_option;
     }
   }
 }