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

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

Index: ios/chrome/browser/ui/payments/payment_method_selection_coordinator.mm
diff --git a/ios/chrome/browser/ui/payments/payment_method_selection_coordinator.mm b/ios/chrome/browser/ui/payments/payment_method_selection_coordinator.mm
index b3a15081a4dde6627789a1683b936b39488f06e6..f0e40bfaf0d3f4dffed2315502811a7e09d3baa5 100644
--- a/ios/chrome/browser/ui/payments/payment_method_selection_coordinator.mm
+++ b/ios/chrome/browser/ui/payments/payment_method_selection_coordinator.mm
@@ -7,6 +7,7 @@
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/strings/grit/components_strings.h"
 #include "ios/chrome/browser/payments/payment_request.h"
+#import "ios/chrome/browser/ui/payments/cells/payment_method_item.h"
 #include "ios/chrome/browser/ui/payments/payment_method_selection_mediator.h"
 #include "ui/base/l10n/l10n_util.h"
 
@@ -83,8 +84,16 @@ const int64_t kDelegateNotificationDelayInNanoSeconds = 0.2 * NSEC_PER_SEC;
   self.mediator.selectedItemIndex = index;
 
   DCHECK(index < self.paymentRequest->credit_cards().size());
-  [self delayedNotifyDelegateOfSelection:self.paymentRequest
-                                             ->credit_cards()[index]];
+  autofill::CreditCard* creditCard = self.paymentRequest->credit_cards()[index];
+
+  // Proceed with item selection only if the item has all required info, or
+  // else bring up the credit card editor.
+  CollectionViewItem<PaymentsIsSelectable>* selectedItem =
+      self.mediator.selectableItems[index];
+  if (selectedItem.complete)
+    [self delayedNotifyDelegateOfSelection:creditCard];
+  else
+    [self startCreditCardEditCoordinatorWithCreditCard:creditCard];
 }
 
 - (void)paymentRequestSelectorViewControllerDidFinish: