Use NTPTileSource in MVS interface.

components/ntp_tiles/most_visited_sites.h

Index: components/ntp_tiles/most_visited_sites.h
diff --git a/components/ntp_tiles/most_visited_sites.h b/components/ntp_tiles/most_visited_sites.h
index 77440f4f2a9577ac948d22580dd9e43960dbb06b..c6535211c9630a34d57ab5726fc03fdb9849d3e9 100644
--- a/components/ntp_tiles/most_visited_sites.h
+++ b/components/ntp_tiles/most_visited_sites.h
@@ -129,9 +129,11 @@ class MostVisitedSites : public history::TopSitesObserver,
   void SetMostVisitedURLsObserver(Observer* observer, int num_sites);
 
   void AddOrRemoveBlacklistedUrl(const GURL& url, bool add_url);
-  void RecordTileTypeMetrics(const std::vector<int>& tile_types,
-                             const std::vector<int>& sources);
-  void RecordOpenedMostVisitedItem(int index, int tile_type, int source);
+  void RecordTileTypeMetrics(const std::vector<MostVisitedTileType>& tile_types,
+                             const std::vector<NTPTileSource>& sources);
+  void RecordOpenedMostVisitedItem(int index,
+                                   MostVisitedTileType tile_type,
+                                   NTPTileSource source);
 
   // MostVisitedSitesSupervisor::Observer implementation.
   void OnBlockedSitesChanged() override;