[Payments] Currency formatter for order amounts.

components/payments/payment_request.cc

 // 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.
 
 #include "components/payments/payment_request.h"
 
 #include "components/payments/payment_details_validation.h"
 #include "components/payments/payment_request_delegate.h"
 #include "components/payments/payment_request_web_contents_manager.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 43 matching lines @@
 
 void PaymentRequest::Cancel() {
   client_->OnError(payments::mojom::PaymentErrorReason::USER_CANCEL);
 }
 
 void PaymentRequest::OnError() {
   binding_.Close();
   manager_->DestroyRequest(this);
 }
 
+CurrencyFormatter* PaymentRequest::GetOrCreateCurrencyFormatter(
+    const std::string& currency_code,
+    const base::Optional<std::string> currency_system,
+    const std::string& locale_name) {
+  if (!currency_formatter_) {
+    currency_formatter_.reset(
+        new CurrencyFormatter(currency_code, currency_system, locale_name));
+  }
+
+  return currency_formatter_.get();
+}
+
 }  // namespace payments