Add baked-in favicons for default popular sites on NTP

components/ntp_tiles/most_visited_sites.h

 // Copyright 2013 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 COMPONENTS_NTP_TILES_MOST_VISITED_SITES_H_
 #define COMPONENTS_NTP_TILES_MOST_VISITED_SITES_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 163 matching lines @@
   // Takes the personal tiles, creates and merges in whitelist and popular tiles
   // if appropriate, and saves the new tiles.
   void SaveNewTiles(NTPTilesVector personal_tiles);
 
   // Notifies the observer about the availability of tiles.
   // Also records impressions UMA if not done already.
   void NotifyMostVisitedURLsObserver();
 
   void OnPopularSitesDownloaded(bool success);
 
-  void OnIconMadeAvailable(const GURL& site_url, bool newly_available);
+  void OnIconMadeAvailable(const GURL& site_url);
 
   // history::TopSitesObserver implementation.
   void TopSitesLoaded(history::TopSites* top_sites) override;
   void TopSitesChanged(history::TopSites* top_sites,
                        ChangeReason change_reason) override;
 
   PrefService* prefs_;
   scoped_refptr<history::TopSites> top_sites_;
   suggestions::SuggestionsService* suggestions_service_;
   std::unique_ptr<PopularSites> const popular_sites_;
@@ skipping 20 matching lines @@
   // For callbacks may be run after destruction, used exclusively for TopSites
   // (since it's used to detect whether there's a query in flight).
   base::WeakPtrFactory<MostVisitedSites> top_sites_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MostVisitedSites);
 };
 
 }  // namespace ntp_tiles
 
 #endif  // COMPONENTS_NTP_TILES_MOST_VISITED_SITES_H_