Only distill unread items

components/reading_list/ios/reading_list_model_observer.h

Index: components/reading_list/ios/reading_list_model_observer.h
diff --git a/components/reading_list/ios/reading_list_model_observer.h b/components/reading_list/ios/reading_list_model_observer.h
index 123ea0ba17cbfeae9316035aa1977c05dd5a37af..fc5956917ef41928efef93a7c7cca98d7ca48a24 100644
--- a/components/reading_list/ios/reading_list_model_observer.h
+++ b/components/reading_list/ios/reading_list_model_observer.h
@@ -45,6 +45,12 @@ class ReadingListModelObserver {
   virtual void ReadingListWillMoveEntry(const ReadingListModel* model,
                                         const GURL& url) {}
 
+  // Invoked when elements |MarkEntryUpdated| has been called on an entry. This
+  // means that the order of the entry may have changed and read/unread list may
+  // have changed too.
+  virtual void ReadingListDidMoveEntry(const ReadingListModel* model,
+                                       const GURL& url) {}
+
   // Invoked when elements are added.
   virtual void ReadingListWillAddEntry(const ReadingListModel* model,
                                        const ReadingListEntry& entry) {}