[Payment Request] Makes sure only complete credit cards can be selected

ios/chrome/browser/ui/payments/payment_request_coordinator.mm

Index: ios/chrome/browser/ui/payments/payment_request_coordinator.mm
diff --git a/ios/chrome/browser/ui/payments/payment_request_coordinator.mm b/ios/chrome/browser/ui/payments/payment_request_coordinator.mm
index b0ca87fb9546e6410ed836c9ec4037f4175102f5..87624db2d4d92a353f130e84917ad0539e9cd82a 100644
--- a/ios/chrome/browser/ui/payments/payment_request_coordinator.mm
+++ b/ios/chrome/browser/ui/payments/payment_request_coordinator.mm
@@ -12,6 +12,7 @@
 #include "components/strings/grit/components_strings.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/payments/payment_request.h"
+#include "ios/chrome/browser/payments/payment_request_util.h"
 #include "ios/chrome/browser/ui/payments/full_card_requester.h"
 #include "ios/chrome/browser/ui/payments/payment_request_mediator.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -426,6 +427,8 @@ contactInfoSelectionCoordinator:(ContactInfoSelectionCoordinator*)coordinator
             (PaymentMethodSelectionCoordinator*)coordinator
                    didSelectPaymentMethod:(autofill::CreditCard*)creditCard {
   DCHECK(creditCard);
+  DCHECK(payment_request_util::IsCreditCardCompleteForPayment(
+      *creditCard, _paymentRequest->billing_profiles()));
   _paymentRequest->set_selected_credit_card(creditCard);
   [_viewController updatePaymentMethodSection];