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

components/payments/payment_request.h

Index: components/payments/payment_request.h
diff --git a/components/payments/payment_request.h b/components/payments/payment_request.h
index cbd0e246ab9d79a501faffb3ef718c34844a093b..6f773f0174ed23cd9c14ce5e72dc67690369724b 100644
--- a/components/payments/payment_request.h
+++ b/components/payments/payment_request.h
@@ -10,6 +10,10 @@
 #include "components/payments/payment_request.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
+namespace autofill {
+class CreditCard;
+}
+
 namespace content {
 class WebContents;
 }
@@ -41,8 +45,13 @@ class PaymentRequest : payments::mojom::PaymentRequest {
 
   void Cancel();
   void OnError();
-  payments::mojom::PaymentDetails* details() { return details_.get(); }
 
+  // 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: