Only distill unread items

components/reading_list/ios/reading_list_model_observer.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_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_
 #define COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 27 matching lines @@
 
   // Invoked when elements are about to be removed from the read or unread list.
   virtual void ReadingListWillRemoveEntry(const ReadingListModel* model,
                                           const GURL& url) {}
   // Invoked when elements |MarkEntryUpdated| is called on an entry. This means
   // that the order of the entry may change and read/unread list may change
   // too.
   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) {}
 
   // Invoked when elements have been added. This method is called after the
   // the entry has been added to the model and the entry can now be retrieved
   // from the model.
   virtual void ReadingListDidAddEntry(const ReadingListModel* model,
                                       const GURL& url) {}
 
   // Invoked when an entry is about to change.
   virtual void ReadingListWillUpdateEntry(const ReadingListModel* model,
                                           const GURL& url) {}
 
   // Called after all the changes signaled by calls to the "Will" methods are
   // done. All the "Will" methods are called as necessary, then the changes
   // are applied and then this method is called.
   virtual void ReadingListDidApplyChanges(ReadingListModel* model) {}
 
  protected:
   ReadingListModelObserver() {}
   virtual ~ReadingListModelObserver() {}
 
   DISALLOW_COPY_AND_ASSIGN(ReadingListModelObserver);
 };
 
 #endif  // COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_