[Payment Request] Protocol for payments items with accessoryType property

ios/chrome/browser/payments/cells/price_item.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_PAYMENTS_CELLS_PRICE_ITEM_H_
 #define IOS_CHROME_BROWSER_PAYMENTS_CELLS_PRICE_ITEM_H_
 
 #import <UIKit/UIKit.h>
 
+#import "ios/chrome/browser/payments/cells/payments_has_accessory_type.h"
 #import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
 #import "ios/third_party/material_components_ios/src/components/CollectionCells/src/MaterialCollectionCells.h"
 
 // PriceItem is the model class corresponding to PriceCell.
-@interface PriceItem : CollectionViewItem
-
-// The accessory type to display on the trailing edge of the cell.
-@property(nonatomic) MDCCollectionViewCellAccessoryType accessoryType;
+@interface PriceItem : CollectionViewItem<PaymentsHasAccessoryType>
 
 // The leading item string.
 @property(nonatomic, copy) NSString* item;
 
 // The middle notification string.
 @property(nonatomic, copy) NSString* notification;
 
 // The trailing price string.
 @property(nonatomic, copy) NSString* price;
 
@@ skipping 19 matching lines @@
 @interface PriceCell (TestingOnly)
 
 // Exposed for testing.
 @property(nonatomic, readonly) CGFloat itemLabelTargetWidth;
 @property(nonatomic, readonly) CGFloat notificationLabelTargetWidth;
 @property(nonatomic, readonly) CGFloat priceLabelTargetWidth;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_PAYMENTS_CELLS_PRICE_ITEM_H_