Remove suggestions notified as invalid

ios/chrome/browser/ui/content_suggestions/content_suggestions_data_sink.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_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_DATA_SINK_H_
 #define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_DATA_SINK_H_
 
+@class ContentSuggestionIdentifier;
+
 // Data sink for the ContentSuggestions. It will be notified when new data needs
 // to be pulled.
 @protocol ContentSuggestionsDataSink
 
 // Notifies the Data Sink that new data is available.
 - (void)dataAvailable;
 
+// The suggestion associated with |suggestionIdentifier| has been invalidated
+// and should be cleared now. This is why this method is about the data source
+// pushing information to the data sink.
+- (void)clearSuggestion:(ContentSuggestionIdentifier*)suggestionIdentifier;

[lpromero, 2017/03/09 10:00:44]

Maybe: has been invalidated "in the backend"? Or equivalent.

[gambard, 2017/03/09 12:21:23]

Well, "by the data source" maybe. I am not sure this is relevant: is it
important to know who invalidated it?

[lpromero, 2017/03/09 12:59:23]

Well, there are and there will be more and more classes. I think it helps
understand when we mention the context too.

[gambard, 2017/03/09 13:32:49]

Done.

+
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_DATA_SINK_H_