Suggestions UI - expandable item

ios/chrome/browser/ui/suggestions/suggestions_view_controller.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_SUGGESTIONS_SUGGESTIONS_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_SUGGESTIONS_SUGGESTIONS_VIEW_CONTROLLER_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
 
+#import "ios/chrome/browser/ui/suggestions/suggestions_expandable_item.h"
+
 @protocol SuggestionsCommands;
 
 // CollectionViewController to display the suggestions items.
-@interface SuggestionsViewController : CollectionViewController
+@interface SuggestionsViewController
+    : CollectionViewController<SuggestionsExpandableCellAudience>
 
 // Handler for the commands sent by the SuggestionsViewController.
 @property(nonatomic, weak) id<SuggestionsCommands> suggestionCommandHandler;
 
 // Adds a text item with a |title| and a |subtitle| in the section numbered
 // |section|. If |section| is greater than the current number of section, it
 // will add a new section at the end.
 - (void)addTextItem:(NSString*)title
            subtitle:(NSString*)subtitle
           toSection:(NSInteger)inputSection;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_SUGGESTIONS_SUGGESTIONS_VIEW_CONTROLLER_H_