[Web Payments] Add a mechanism to build item lists in the PR dialog.

chrome/browser/ui/views/payments/payment_request_views_util.h

Index: chrome/browser/ui/views/payments/payment_request_views_util.h
diff --git a/chrome/browser/ui/views/payments/payment_request_views_util.h b/chrome/browser/ui/views/payments/payment_request_views_util.h
index 56220237fdd5687482e67027a05a6f2899f53bf8..0c6f3e6be374ffc77f94eb8a055bb1c6d7e3ec8e 100644
--- a/chrome/browser/ui/views/payments/payment_request_views_util.h
+++ b/chrome/browser/ui/views/payments/payment_request_views_util.h
@@ -12,6 +12,7 @@
 
 namespace autofill {
 class AutofillProfile;
+class CreditCard;
 }
 
 namespace views {
@@ -24,6 +25,7 @@ namespace payments {
 
 constexpr int kPaymentRequestRowHorizontalInsets = 14;
 constexpr int kPaymentRequestRowVerticalInsets = 8;
+constexpr int kPaymentRequestButtonSpacing = 10;
 
 enum class PaymentRequestCommonTags {
   BACK_BUTTON_TAG = 0,
@@ -72,6 +74,9 @@ std::unique_ptr<views::View> GetContactInfoLabel(
 // as a separator between items in the Payment Request dialog.
 std::unique_ptr<views::Border> CreatePaymentRequestRowBorder();
 
+std::unique_ptr<views::View> CreateCreditCardIconView(
+    autofill::CreditCard* card);
+
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_VIEWS_UTIL_H_