[Payment Request] Payment request summary view pending state

ios/chrome/browser/payments/payment_method_selection_coordinator.mm

Index: ios/chrome/browser/payments/payment_method_selection_coordinator.mm
diff --git a/ios/chrome/browser/payments/payment_method_selection_coordinator.mm b/ios/chrome/browser/payments/payment_method_selection_coordinator.mm
index a6a614ac1382d506b3a26df98ce09a3a65e5b860..4d32e858aca49319783b1c2e8099f0b2e8ff54b2 100644
--- a/ios/chrome/browser/payments/payment_method_selection_coordinator.mm
+++ b/ios/chrome/browser/payments/payment_method_selection_coordinator.mm
@@ -67,6 +67,10 @@
                                static_cast<int64_t>(0.2 * NSEC_PER_SEC)),
                  dispatch_get_main_queue(), ^{
                    PaymentMethodSelectionCoordinator* strongSelf = weakSelf;
+                   // Early return if the coordinator has been deallocated.
+                   if (!strongSelf)
+                     return;
+
                    strongSelf.viewController.view.userInteractionEnabled = YES;
                    [strongSelf.delegate
                        paymentMethodSelectionCoordinator:strongSelf