[WebPayments] Add the Payment Method section in the Payment Sheet

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 autofill {
+class CreditCard;
+}
+
 namespace content {
 class WebContents;
 }
 
 namespace payments {
 
 class PaymentRequestDelegate;
 class PaymentRequestWebContentsManager;
 
 class PaymentRequest : payments::mojom::PaymentRequest {
@@ skipping 21 matching lines @@
 
   // 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);
 
+  // Returns the currently selected credit card for this PaymentRequest flow.
+  // It's not guaranteed to be complete. Returns nullptr if there is no selected
+  // card.
+  autofill::CreditCard* GetCurrentlySelectedCreditCard();
+
   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_