Add more features to ntp-tiles-internal

components/ntp_tiles/webui/ntp_tiles_internals_message_handler.h

Index: components/ntp_tiles/webui/ntp_tiles_internals_message_handler.h
diff --git a/components/ntp_tiles/webui/ntp_tiles_internals_message_handler.h b/components/ntp_tiles/webui/ntp_tiles_internals_message_handler.h
index 23727465e8450faa656fd557caa4f180916241f8..3d99b949733180ffd841d59e155768ed58e5cf18 100644
--- a/components/ntp_tiles/webui/ntp_tiles_internals_message_handler.h
+++ b/components/ntp_tiles/webui/ntp_tiles_internals_message_handler.h
@@ -10,6 +10,7 @@
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "base/optional.h"
 #include "components/ntp_tiles/most_visited_sites.h"
 
 namespace base {
@@ -39,9 +40,12 @@ class NTPTilesInternalsMessageHandler : public MostVisitedSites::Observer {
   // Callbacks registered in RegisterMessages().
   void HandleRegisterForEvents(const base::ListValue* args);
   void HandleUpdate(const base::ListValue* args);
+  void HandleFetchSuggestions(const base::ListValue* args);
+  void HandleViewPopularSitesJson(const base::ListValue* args);
 
   void SendSourceInfo();
   void SendTiles(const NTPTilesVector& tiles);
+  void PopularSitesJsonRead(const base::Optional<std::string>& content);
 
   // MostVisitedSites::Observer.
   void OnMostVisitedURLsAvailable(const NTPTilesVector& tiles) override;
@@ -53,6 +57,11 @@ class NTPTilesInternalsMessageHandler : public MostVisitedSites::Observer {
   int site_count_;
   std::unique_ptr<MostVisitedSites> most_visited_sites_;
 
+  std::string suggestions_status_;
+  std::string popular_sites_json_;
+
+  base::WeakPtrFactory<NTPTilesInternalsMessageHandler> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(NTPTilesInternalsMessageHandler);
 };