Add extra information for ReadingList ContentSuggestion

components/ntp_snippets/content_suggestion.cc

 // 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.
 
 #include "components/ntp_snippets/content_suggestion.h"
 
 #include <utility>
 
 namespace ntp_snippets {
 
@@ skipping 37 matching lines @@
   DCHECK(id_.category().IsKnownCategory(KnownCategories::DOWNLOADS));
   download_suggestion_extra_ = std::move(download_suggestion_extra);
 }
 
 void ContentSuggestion::set_recent_tab_suggestion_extra(
     std::unique_ptr<RecentTabSuggestionExtra> recent_tab_suggestion_extra) {
   DCHECK(id_.category().IsKnownCategory(KnownCategories::RECENT_TABS));
   recent_tab_suggestion_extra_ = std::move(recent_tab_suggestion_extra);
 }
 
+void ContentSuggestion::set_reading_list_suggestion_extra(
+    std::unique_ptr<ReadingListSuggestionExtra> reading_list_suggestion_extra) {
+  DCHECK(id_.category().IsKnownCategory(KnownCategories::READING_LIST));
+  reading_list_suggestion_extra_ = std::move(reading_list_suggestion_extra);
+}
+
 void ContentSuggestion::set_notification_extra(
     std::unique_ptr<NotificationExtra> notification_extra) {
   notification_extra_ = std::move(notification_extra);
 }
 
 }  // namespace ntp_snippets