FetchMore functionality backend

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 24 matching lines @@
 
   static void RegisterProfilePrefs(PrefRegistrySimple* registry);
 
  private:
   // ContentSuggestionsProvider implementation.
   CategoryStatus GetCategoryStatus(Category category) override;
   CategoryInfo GetCategoryInfo(Category category) override;
   void DismissSuggestion(const ContentSuggestion::ID& suggestion_id) override;
   void FetchSuggestionImage(const ContentSuggestion::ID& suggestion_id,
                             const ImageFetchedCallback& callback) override;
+  void FetchMore(const Category& category,

[vitaliii, 2016/11/01 23:29:57]

nit:FetchMoreSuggestions
currently it is difficult to understand what is actually fetched by looking at
the declaration only.

[fhorschig, 2016/11/02 05:05:27]

The function is inherited from the SuggestionsProvider which makes it clear that
suggestions are fetched. As the function might be used for other fetches, too,
the name was changed in CL 2466863003.

+                 const FetchedMoreCallback& callback) override;
   void ClearHistory(
       base::Time begin,
       base::Time end,
       const base::Callback<bool(const GURL& url)>& filter) override;
   void ClearCachedSuggestions(Category category) override;
   void GetDismissedSuggestionsForDebugging(
       Category category,
       const DismissedSuggestionsCallback& callback) override;
   void ClearDismissedSuggestionsForDebugging(Category category) override;
 
@@ skipping 58 matching lines @@
   // For six weeks after first installing M54, this is true and the
   // fallback implemented in BookmarkLastVisitUtils is activated.
   bool creation_date_fallback_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkSuggestionsProvider);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_BOOKMARKS_BOOKMARK_SUGGESTIONS_PROVIDER_H_