Adds accessoryType property to CollectionViewItem

ios/chrome/browser/ui/collection_view/cells/collection_view_detail_item.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_COLLECTION_VIEW_CELLS_COLLECTION_VIEW_DETAIL_ITEM_H_
 #define IOS_CHROME_BROWSER_UI_COLLECTION_VIEW_CELLS_COLLECTION_VIEW_DETAIL_ITEM_H_
 
 #import <UIKit/UIKit.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"
 
 // CollectionViewDetailItem is the model class corresponding to
 // CollectionViewDetailCell.
 @interface CollectionViewDetailItem : CollectionViewItem
 
-// The accessory type to display on the trailing edge of the cell.
-@property(nonatomic) MDCCollectionViewCellAccessoryType accessoryType;
-
 // The main text string.
 @property(nonatomic, copy) NSString* text;
 
 // The detail text string.
 @property(nonatomic, copy) NSString* detailText;
 
 @end
 
 // CollectionViewDetailCell implements an MDCCollectionViewCell subclass
 // containing two text labels: a "main" label and a "detail" label.  The two
@@ skipping 18 matching lines @@
 // - If both labels want more width than their guaranteed minimums (75% and
 //   25%), use the guaranteed minimum amount for each.
 //
 // Exposed for testing.
 @property(nonatomic, readonly) CGFloat textLabelTargetWidth;
 @property(nonatomic, readonly) CGFloat detailTextLabelTargetWidth;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_COLLECTION_VIEW_CELLS_COLLECTION_VIEW_DETAIL_ITEM_H_