Add a fallback to creation date for Recent bookmarks on NTP

components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h

 // Copyright 2016 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_SNIPPETS_BOOKMARKS_BOOKMARK_SUGGESTIONS_PROVIDER_H_
 #define COMPONENTS_NTP_SNIPPETS_BOOKMARKS_BOOKMARK_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 77 matching lines @@
   // happen before the Bookmark model gets loaded.
   void FetchBookmarks();
 
   // Updates the |category_status_| and notifies the |observer_|, if necessary.
   void NotifyStatusChanged(CategoryStatus new_status);
 
   CategoryStatus category_status_;
   const Category provided_category_;
   bookmarks::BookmarkModel* bookmark_model_;
   bool fetch_requested_;
+  // Is there any visit data for bookmarks available?
+  bool no_visit_data_;
 
   base::Time node_to_change_last_visit_date_;
   base::Time end_of_list_last_visit_date_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkSuggestionsProvider);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_BOOKMARKS_BOOKMARK_SUGGESTIONS_PROVIDER_H_