Suggested Articles can be dismissed

ios/chrome/browser/content_suggestions/content_suggestions_mediator.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_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_MEDIATOR_H_
 #define IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_MEDIATOR_H_
 
 #import <UIKit/UIKit.h>
 
 #import "ios/chrome/browser/content_suggestions/content_suggestions_mediator.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_data_source.h"
 
 namespace ntp_snippets {
 class ContentSuggestionsService;
 }
 
+@class ContentSuggestionIdentifier;
+
 // Mediator for ContentSuggestions. Makes the interface between a
 // ntp_snippets::ContentSuggestionsService and the Objective-C services using
 // its data.
 @interface ContentSuggestionsMediator : NSObject<ContentSuggestionsDataSource>
 
 // Initialize the mediator with the |contentService| to mediate.
 - (instancetype)initWithContentService:
     (ntp_snippets::ContentSuggestionsService*)contentService
     NS_DESIGNATED_INITIALIZER;
 - (instancetype)init NS_UNAVAILABLE;
 
+- (void)dismissSuggestion:(ContentSuggestionIdentifier*)suggestionIdentifier;

[lpromero, 2017/03/06 10:29:00]

Add a comment that UI code calls this to remove the suggestion from the content
service. Otherwise it could 
be ambiguous.

[gambard, 2017/03/06 12:16:00]

It should not be ambiguous as the mediator does not have a reference to the UI
(by design) :)
I have added a comment.

+
 @end
 
 #endif  // IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_MEDIATOR_H_