[NTP Snippets] FetchMore backend

components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h

Index: components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h
diff --git a/components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h b/components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h
index 2bf8ebb0fe2c0a9df2101ac73bc27f50d6cea797..706514d2fa1a4adaafa13b57e7bc7f3a83bfdf91 100644
--- a/components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h
+++ b/components/ntp_snippets/bookmarks/bookmark_suggestions_provider.h
@@ -42,6 +42,8 @@ class BookmarkSuggestionsProvider : public ContentSuggestionsProvider,
   void DismissSuggestion(const ContentSuggestion::ID& suggestion_id) override;
   void FetchSuggestionImage(const ContentSuggestion::ID& suggestion_id,
                             const ImageFetchedCallback& callback) override;
+  void FetchMore(const Category& category,
+                 FetchedMoreCallback callback) override;
   void ClearHistory(
       base::Time begin,
       base::Time end,