Track if a ReadingListEntry has been dismissed

components/reading_list/core/reading_list_model.h

Index: components/reading_list/core/reading_list_model.h
diff --git a/components/reading_list/core/reading_list_model.h b/components/reading_list/core/reading_list_model.h
index 7666cce0fa6323c0b6496bb351e1590481edd4b8..d0031588b7f245fc6b37a1a5a0f4c183847a5322 100644
--- a/components/reading_list/core/reading_list_model.h
+++ b/components/reading_list/core/reading_list_model.h
@@ -130,6 +130,10 @@ class ReadingListModel : public base::NonThreadSafe {
                                      int64_t distilation_size,
                                      const base::Time& distilation_time) = 0;
 
+  // Sets the extra info for the entry |url|.
+  virtual void SetContentSuggestionsExtra(
+      const GURL& url,
+      const reading_list::ContentSuggestionsExtra& extra) = 0;
   // Observer registration methods. The model will remove all observers upon
   // destruction automatically.
   void AddObserver(ReadingListModelObserver* observer);