[Payment Request] Payment request summary view pending state

ios/chrome/browser/payments/shipping_option_selection_coordinator.mm

Index: ios/chrome/browser/payments/shipping_option_selection_coordinator.mm
diff --git a/ios/chrome/browser/payments/shipping_option_selection_coordinator.mm b/ios/chrome/browser/payments/shipping_option_selection_coordinator.mm
index 8d37c51738599c000fb86febbb78ec990f1338cb..ba8691f319b32678a069da09e7fe9954650ea175 100644
--- a/ios/chrome/browser/payments/shipping_option_selection_coordinator.mm
+++ b/ios/chrome/browser/payments/shipping_option_selection_coordinator.mm
@@ -53,11 +53,10 @@
   // delayedNotifyDelegateOfSelection.
   _viewController.view.userInteractionEnabled = YES;
 
-  [_viewController setIsLoading:NO];
-  NSString* errorMessage =
-      payment_request_util::GetShippingOptionSelectorErrorMessage(
-          _paymentRequest);
-  [_viewController setErrorMessage:errorMessage];
+  [_viewController setPending:NO];
+  [_viewController setErrorMessage:payment_request_util::
+                                       GetShippingOptionSelectorErrorMessage(
+                                           _paymentRequest)];
   [_viewController loadModel];
   [[_viewController collectionView] reloadData];
 }
@@ -84,7 +83,10 @@
                                static_cast<int64_t>(0.2 * NSEC_PER_SEC)),
                  dispatch_get_main_queue(), ^{
                    ShippingOptionSelectionCoordinator* strongSelf = weakSelf;
-                   [strongSelf.viewController setIsLoading:YES];
+                   // Early return if the coordinator has been deallocated.
+                   if (!strongSelf)
+                     return;
+                   [strongSelf.viewController setPending:YES];
                    [strongSelf.viewController loadModel];
                    [[strongSelf.viewController collectionView] reloadData];