Add ChromeMostVisitedSitesFactory

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 35 matching lines @@
   };
 
   class Observer {
    public:
     virtual void OnBlockedSitesChanged() = 0;
 
    protected:
     ~Observer() {}
   };
 
+  virtual ~MostVisitedSitesSupervisor() {}
+
   // Pass non-null to set observer, or null to remove observer.
   // If setting observer, there must not yet be an observer set.
   // If removing observer, there must already be one to remove.
   // Does not take ownership. Observer must outlive this object.
   virtual void SetObserver(Observer* new_observer) = 0;
 
   // If true, |url| should not be shown on the NTP.
   virtual bool IsBlocked(const GURL& url) = 0;
 
   // Explicitly-specified sites to show on NTP.
   virtual std::vector<Whitelist> whitelists() = 0;
 
   // If true, be conservative about suggesting sites from outside sources.
   virtual bool IsChildProfile() = 0;
-
- protected:
-  virtual ~MostVisitedSitesSupervisor() {}
 };
 
 // Tracks the list of most visited sites and their thumbnails.
 class MostVisitedSites : public history::TopSitesObserver,
                          public MostVisitedSitesSupervisor::Observer {
  public:
   using PopularSitesVector = std::vector<PopularSites::Site>;
 
   // The observer to be notified when the list of most visited sites changes.
   class Observer {
    public:
     virtual void OnMostVisitedURLsAvailable(const NTPTilesVector& tiles) = 0;
     virtual void OnIconMadeAvailable(const GURL& site_url) = 0;
 
    protected:
     virtual ~Observer() {}
   };
 
   // Construct a MostVisitedSites instance.
   //
   // |prefs| and |suggestions| are required and may not be null. |top_sites|,
   // |popular_sites|, and |supervisor| are optional and if null the associated
   // features will be disabled.
   MostVisitedSites(PrefService* prefs,
                    scoped_refptr<history::TopSites> top_sites,
                    suggestions::SuggestionsService* suggestions,
                    std::unique_ptr<PopularSites> popular_sites,
                    std::unique_ptr<IconCacher> icon_cacher,
-                   MostVisitedSitesSupervisor* supervisor);
+                   std::unique_ptr<MostVisitedSitesSupervisor> supervisor);
 
   ~MostVisitedSites() override;
 
   // Sets the observer, and immediately fetches the current suggestions.
   // Does not take ownership of |observer|, which must outlive this object and
   // must not be null.
   void SetMostVisitedURLsObserver(Observer* observer, int num_sites);
 
   // Requests an asynchronous refresh of the suggestions. Notifies the observer
   // once the request completes.
@@ skipping 58 matching lines @@
   // 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_;
   std::unique_ptr<IconCacher> const icon_cacher_;
-  MostVisitedSitesSupervisor* supervisor_;
+  std::unique_ptr<MostVisitedSitesSupervisor> supervisor_;
 
   Observer* observer_;
 
   // The maximum number of most visited sites to return.
   int num_sites_;
 
   std::unique_ptr<
       suggestions::SuggestionsService::ResponseCallbackList::Subscription>
       suggestions_subscription_;
 
   ScopedObserver<history::TopSites, history::TopSitesObserver>
       top_sites_observer_;
 
   // The main source of personal tiles - either TOP_SITES or SUGGESTIONS_SEVICE.
   NTPTileSource mv_source_;
 
   NTPTilesVector current_tiles_;
 
   // For callbacks may be run after destruction.
   base::WeakPtrFactory<MostVisitedSites> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MostVisitedSites);
 };
 
 }  // namespace ntp_tiles
 
 #endif  // COMPONENTS_NTP_TILES_MOST_VISITED_SITES_H_