Add support for components/ntp_tiles in InstantService

chrome/browser/search/instant_service.h

Index: chrome/browser/search/instant_service.h
diff --git a/chrome/browser/search/instant_service.h b/chrome/browser/search/instant_service.h
index 8ccebcd86b28d38672e83b044206a57f56b57810..6cc8efff5843950381e07a47434f39de9aa80d6b 100644
--- a/chrome/browser/search/instant_service.h
+++ b/chrome/browser/search/instant_service.h
@@ -16,6 +16,8 @@
 #include "components/history/core/browser/history_types.h"
 #include "components/history/core/browser/top_sites_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
+#include "components/ntp_tiles/most_visited_sites.h"
+#include "components/ntp_tiles/ntp_tile.h"
 #include "components/search_engines/template_url_service_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -38,7 +40,8 @@ class RenderProcessHost;
 class InstantService : public KeyedService,
                        public content::NotificationObserver,
                        public TemplateURLServiceObserver,
-                       public history::TopSitesObserver {
+                       public history::TopSitesObserver,
+                       public ntp_tiles::MostVisitedSites::Observer {
  public:
   explicit InstantService(Profile* profile);
   ~InstantService() override;
@@ -129,6 +132,11 @@ class InstantService : public KeyedService,
   // NotifyAboutMostVisitedItems.
   void OnMostVisitedItemsReceived(const history::MostVisitedURLList& data);
 
+  // ntp_tiles::MostVisitedSites::Observer implementation.
+  void OnMostVisitedURLsAvailable(
+      const ntp_tiles::NTPTilesVector& tiles) override;
+  void OnIconMadeAvailable(const GURL& site_url) override;
+
   // Notifies the observer about the last known most visited items.
   void NotifyAboutMostVisitedItems();
 
@@ -168,6 +176,8 @@ class InstantService : public KeyedService,
   std::unique_ptr<TemplateURLData> previous_default_search_provider_;
   GURL previous_google_base_url_;
 
+  std::unique_ptr<ntp_tiles::MostVisitedSites> most_visited_sites_;
+
   // Used for Top Sites async retrieval.
   base::WeakPtrFactory<InstantService> weak_ptr_factory_;