[Payment Request] Generic edit form

ios/chrome/browser/payments/payment_request_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/payment_request_coordinator.h"
 
 #include <unordered_set>
 #include <vector>
 
 #include "base/memory/ptr_util.h"
@@ skipping 152 matching lines @@
 
   [[self baseViewController] presentViewController:_navigationController
                                           animated:YES
                                         completion:nil];
 }
 
 - (void)stop {
   [[_navigationController presentingViewController]
       dismissViewControllerAnimated:YES
                          completion:nil];
+  [_itemsDisplayCoordinator stop];
   _itemsDisplayCoordinator = nil;
+  [_shippingAddressSelectionCoordinator stop];
   _shippingAddressSelectionCoordinator = nil;
+  [_shippingOptionSelectionCoordinator stop];
   _shippingOptionSelectionCoordinator = nil;
+  [_methodSelectionCoordinator stop];
   _methodSelectionCoordinator = nil;
+  [_errorCoordinator stop];
   _errorCoordinator = nil;
   _viewController = nil;
   _navigationController = nil;
 }
 
 - (void)sendPaymentResponse {
   DCHECK(_paymentRequest->selected_credit_card());
   autofill::CreditCard* card = _paymentRequest->selected_credit_card();
   _fullCardRequester = base::MakeUnique<FullCardRequester>(
       self, _navigationController, _browserState);
@@ skipping 261 matching lines @@
 - (void)paymentMethodSelectionCoordinatorDidReturn:
     (PaymentMethodSelectionCoordinator*)coordinator {
   // Clear the 'Updated' label on the payment summary item, if there is one.
   [_viewController updatePaymentSummaryWithTotalValueChanged:NO];
 
   [_methodSelectionCoordinator stop];
   _methodSelectionCoordinator = nil;
 }
 
 @end