[Payments] Currency formatter for order amounts.

components/payments/payment_request.h

 // 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.
 
 #ifndef COMPONENTS_PAYMENTS_PAYMENT_REQUEST_H_
 #define COMPONENTS_PAYMENTS_PAYMENT_REQUEST_H_
 
 #include <memory>
 
+#include "base/optional.h"
+#include "components/payments/currency_formatter.h"
 #include "components/payments/payment_request.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace payments {
 
 class PaymentRequestDelegate;
@@ skipping 14 matching lines @@
             payments::mojom::PaymentDetailsPtr details,
             payments::mojom::PaymentOptionsPtr options) override;
   void Show() override;
   void UpdateWith(payments::mojom::PaymentDetailsPtr details) override {}
   void Abort() override {}
   void Complete(payments::mojom::PaymentComplete result) override {}
   void CanMakePayment() override {}
 
   void Cancel();
   void OnError();
+
+  // Returns the CurrencyFormatter instance for this PaymentRequest.
+  // |locale_name| should be the result of the browser's GetApplicationLocale().
+  // Note: Having multiple currencies per PaymentRequest is not supported; hence
+  // the CurrencyFormatter is cached here.
+  CurrencyFormatter* GetOrCreateCurrencyFormatter(
+      const std::string& currency_code,
+      const base::Optional<std::string> currency_system,
+      const std::string& locale_name);
+
   payments::mojom::PaymentDetails* details() { return details_.get(); }
 
   content::WebContents* web_contents() { return web_contents_; }
 
  private:
   content::WebContents* web_contents_;
   std::unique_ptr<PaymentRequestDelegate> delegate_;
   // |manager_| owns this PaymentRequest.
   PaymentRequestWebContentsManager* manager_;
   mojo::Binding<payments::mojom::PaymentRequest> binding_;
   payments::mojom::PaymentRequestClientPtr client_;
   payments::mojom::PaymentDetailsPtr details_;
+  std::unique_ptr<CurrencyFormatter> currency_formatter_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequest);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_PAYMENT_REQUEST_H_