[Payment Request] Payment request summary view pending state

ios/chrome/browser/payments/shipping_address_selection_coordinator.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/chrome/browser/payments/shipping_address_selection_coordinator.h"
 
 #include "base/strings/sys_string_conversions.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "ios/chrome/browser/payments/payment_request.h"
 #import "ios/chrome/browser/payments/payment_request_util.h"
@@ skipping 37 matching lines @@
 - (void)stop {
   [self.baseViewController.navigationController popViewControllerAnimated:YES];
   _viewController = nil;
 }
 
 - (void)stopSpinnerAndDisplayError {
   // Re-enable user interactions that were disabled earlier in
   // delayedNotifyDelegateOfSelection.
   _viewController.view.userInteractionEnabled = YES;
 
-  [_viewController setIsLoading:NO];
-  NSString* errorMessage =
-      payment_request_util::GetShippingAddressSelectorErrorMessage(
-          _paymentRequest);
-  [_viewController setErrorMessage:errorMessage];
+  [_viewController setPending:NO];
+  [_viewController setErrorMessage:payment_request_util::
+                                       GetShippingAddressSelectorErrorMessage(
+                                           _paymentRequest)];
   [_viewController loadModel];
   [[_viewController collectionView] reloadData];
 }
 
 #pragma mark - ShippingAddressSelectionViewControllerDelegate
 
 - (void)shippingAddressSelectionViewController:
             (ShippingAddressSelectionViewController*)controller
                       didSelectShippingAddress:
                           (autofill::AutofillProfile*)shippingAddress {
   [self delayedNotifyDelegateOfSelection:shippingAddress];
 }
 
 - (void)shippingAddressSelectionViewControllerDidReturn:
     (ShippingAddressSelectionViewController*)controller {
   [_delegate shippingAddressSelectionCoordinatorDidReturn:self];
 }
 
 - (void)delayedNotifyDelegateOfSelection:
     (autofill::AutofillProfile*)shippingAddress {
   _viewController.view.userInteractionEnabled = NO;
   __weak ShippingAddressSelectionCoordinator* weakSelf = self;
   dispatch_after(dispatch_time(DISPATCH_TIME_NOW,
                                static_cast<int64_t>(0.2 * NSEC_PER_SEC)),
                  dispatch_get_main_queue(), ^{
                    ShippingAddressSelectionCoordinator* 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];
 
                    [strongSelf.delegate
                        shippingAddressSelectionCoordinator:strongSelf
                                   didSelectShippingAddress:shippingAddress];
                  });
 }
 
 @end