Add MostVistedSites to ContentSuggestionsMediator

ios/chrome/browser/content_suggestions/mediator_util.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_MEDIATOR_UTIL_H_
 #define IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_MEDIATOR_UTIL_H_
 
 #include "base/bind.h"
 #include "base/optional.h"
 #include "components/ntp_snippets/category_info.h"
 #include "components/ntp_snippets/content_suggestion.h"
 #include "components/ntp_snippets/status.h"
+#include "components/ntp_tiles/ntp_tile.h"
 #import "ios/chrome/browser/ui/content_suggestions/content_suggestion.h"
 #import "ios/chrome/browser/ui/content_suggestions/identifier/content_suggestions_section_information.h"
 
 namespace ntp_snippets {
 class ContentSuggestion;
 class Category;
 class CategoryInfo;
 }
 
 @class ContentSuggestionsCategoryWrapper;
@@ skipping 29 matching lines @@
 ContentSuggestionsSectionInformation* SectionInformationFromCategoryInfo(
     const base::Optional<ntp_snippets::CategoryInfo>& categoryInfo,
     const ntp_snippets::Category& category);
 
 // Returns a ntp_snippets::ID based on a Objective-C Category and the ID in the
 // category.
 ntp_snippets::ContentSuggestion::ID SuggestionIDForSectionID(
     ContentSuggestionsCategoryWrapper* category,
     const std::string& id_in_category);
 
+// Creates and returns an empty suggestion.
+ContentSuggestion* EmptySuggestion();
+
+// Creates and returns a SectionInfo for the Most Visited section.
+ContentSuggestionsSectionInformation* MostVisitedSectionInformation();
+
+// Records the page impression of the ntp tiles.
+void RecordPageImpression(const std::vector<ntp_tiles::NTPTile>& mostVisited);
+
+// Converts a ntp_snippets::ContentSuggestion to an Objective-C
+// ContentSuggestion.
+ContentSuggestion* ConvertNTPTile(const ntp_tiles::NTPTile& tile);
+
 #endif  // IOS_CHROME_BROWSER_CONTENT_SUGGESTIONS_MEDIATOR_UTIL_H_