Adding CrHome-specific implementation for home page tile.

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 93 matching lines @@
   // Construct a MostVisitedSites instance.
   //
   // |prefs| and |suggestions| are required and may not be null. |top_sites|,
   // |popular_sites|, |supervisor| and |home_page_client| 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,
-                   std::unique_ptr<MostVisitedSitesSupervisor> supervisor,
-                   std::unique_ptr<HomePageClient> home_page_client);
-
-  // TODO(fhorschig): Adjust all factories and delete this.
-  // Constructs a MostVisitedSites instance without HomePageClient.
-  MostVisitedSites(PrefService* prefs,
-                   scoped_refptr<history::TopSites> top_sites,
-                   suggestions::SuggestionsService* suggestions,
-                   std::unique_ptr<PopularSites> popular_sites,
-                   std::unique_ptr<IconCacher> icon_cacher,
                    std::unique_ptr<MostVisitedSitesSupervisor> supervisor);
 
   ~MostVisitedSites() override;
 
   // Returns true if this object was created with a non-null provider for the
   // given NTP tile source. That source may or may not actually provide tiles,
   // depending on its configuration and the priority of different sources.
   bool DoesSourceExist(TileSource source) const;
 
   // Returns the corresponding object passed at construction.
   history::TopSites* top_sites() { return top_sites_.get(); }
   suggestions::SuggestionsService* suggestions() {
     return suggestions_service_;
   }
   PopularSites* popular_sites() { return popular_sites_.get(); }
   MostVisitedSitesSupervisor* supervisor() { return supervisor_.get(); }
 
   // 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, size_t num_sites);
 
+  // Sets the client that provides platform-specific home page preferences.
+  // When used to replace an existing client, the new client will first be used
+  // during the construction of a new tile set.
+  void SetHomePageClient(std::unique_ptr<HomePageClient> client);
+
   // Requests an asynchronous refresh of the suggestions. Notifies the observer
   // if the request resulted in the set of tiles changing.
   void Refresh();
 
   void AddOrRemoveBlacklistedUrl(const GURL& url, bool add_url);
   void ClearBlacklistedUrls();
 
   // MostVisitedSitesSupervisor::Observer implementation.
   void OnBlockedSitesChanged() override;
 
@@ skipping 66 matching lines @@
   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_;
   std::unique_ptr<MostVisitedSitesSupervisor> supervisor_;
-  std::unique_ptr<HomePageClient> const home_page_client_;
+  std::unique_ptr<HomePageClient> home_page_client_;
 
   Observer* observer_;
 
   // The maximum number of most visited sites to return.
   size_t num_sites_;
 
   std::unique_ptr<
       suggestions::SuggestionsService::ResponseCallbackList::Subscription>
       suggestions_subscription_;
 
@@ skipping 11 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_