[Payment Request] Fixes the behavior of selector coordinators in edit mode.

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

 // Copyright 2017 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/ui/payments/payment_request_selector_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/ui/autofill/cells/status_item.h"
 #import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
@@ skipping 30 matching lines @@
   ItemTypeSelectableItem,  // This is a repeated item type.
   ItemTypeSpinner,
   ItemTypeAddItem,
 };
 
 }  // namespace
 
 @interface PaymentRequestSelectorViewController ()<
     PaymentRequestSelectorViewControllerActions>
 
-// Whether or not the editor is in the editing mode.
-@property(nonatomic, assign, getter=isEditing) BOOL editing;
-
 @end
 
 @implementation PaymentRequestSelectorViewController
 
 @synthesize delegate = _delegate;
 @synthesize dataSource = _dataSource;
 @synthesize editing = _editing;
 
 - (instancetype)init {
   if ((self = [super initWithStyle:CollectionViewControllerStyleAppBar])) {
@@ skipping 258 matching lines @@
     hidesInkViewAtIndexPath:(NSIndexPath*)indexPath {
   NSInteger type = [self.collectionViewModel itemTypeForIndexPath:indexPath];
   if (type == ItemTypeHeader) {
     return YES;
   } else {
     return NO;
   }
 }
 
 @end