Pass PopularSites ownership to MostVisitedSites.

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 101 matching lines @@
   };
 
   // Construct a MostVisitedSites instance.
   //
   // |prefs|, |top_sites|, and |suggestions| are required and may not be null.
   // |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,
-                   PopularSites* popular_sites,
+                   std::unique_ptr<PopularSites> popular_sites,
                    MostVisitedSitesSupervisor* supervisor);
 
   ~MostVisitedSites() override;
 
   // Does not take ownership of |observer|, which must outlive this object and
   // must not be null.
   void SetMostVisitedURLsObserver(Observer* observer, int num_sites);
 
   void AddOrRemoveBlacklistedUrl(const GURL& url, bool add_url);
   void RecordTileTypeMetrics(const std::vector<int>& tile_types,
@@ skipping 55 matching lines @@
   void RecordImpressionUMAMetrics();
 
   // 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_;
-  PopularSites* const popular_sites_;
+  std::unique_ptr<PopularSites> const popular_sites_;
   MostVisitedSitesSupervisor* supervisor_;
 
   Observer* observer_;
 
   // The maximum number of most visited sites to return.
   int num_sites_;
 
   // True if we are still waiting for an initial set of most visited sites (from
   // either TopSites or the SuggestionsService).
   bool waiting_for_most_visited_sites_;
@@ skipping 20 matching lines @@
 
   // 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_