Adds accessoryType property to CollectionViewItem

ios/chrome/browser/ui/collection_view/cells/collection_view_account_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_ACCOUNT_ITEM_H_
 #define IOS_CHROME_BROWSER_UI_COLLECTION_VIEW_CELLS_COLLECTION_VIEW_ACCOUNT_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"
 
 @class ChromeIdentity;
 
 // Item for account avatar, used everywhere an account cell is shown.
 @interface CollectionViewAccountItem : CollectionViewItem
 
 @property(nonatomic, strong) UIImage* image;
 @property(nonatomic, copy) NSString* text;
 @property(nonatomic, copy) NSString* detailText;
 @property(nonatomic, assign) BOOL shouldDisplayError;
 @property(nonatomic, strong) ChromeIdentity* chromeIdentity;
 @property(nonatomic, assign, getter=isEnabled) BOOL enabled;
 
-// The accessory type for the represented cell.
-@property(nonatomic) MDCCollectionViewCellAccessoryType accessoryType;
-
 @end
 
 // Cell for account avatar with a leading avatar imageView, title text label,
 // and detail text label. This looks very similar to the
 // MDCCollectionViewDetailCell, except that it applies a circular mask to the
 // imageView. The imageView is vertical-centered and leading aligned.
 // If item/cell is disabled the image and text alpha will be set to 0.5 and
 // user interaction will be disabled.
 @interface CollectionViewAccountCell : MDCCollectionViewCell
 
 // Rounded image used for the account user picture.
 @property(nonatomic, readonly, strong) UIImageView* imageView;
 // Cell title.
 @property(nonatomic, readonly, strong) UILabel* textLabel;
 // Cell subtitle.
 @property(nonatomic, readonly, strong) UILabel* detailTextLabel;
 // Error icon that will be displayed on the left side of the cell.
 @property(nonatomic, readonly, strong) UIImageView* errorIcon;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_COLLECTION_VIEW_CELLS_COLLECTION_VIEW_ACCOUNT_ITEM_H_