Clean ReadingListModel.

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 46 matching lines @@
 
   // 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) {}
 
-  // TODO(crbug.com/664924): Remove temporary methods
-  virtual void ReadingListWillRemoveUnreadEntry(const ReadingListModel* model,
-                                                size_t index) {}
-
-  virtual void ReadingListWillRemoveReadEntry(const ReadingListModel* model,
-                                              size_t index) {}
-
-  virtual void ReadingListWillAddUnreadEntry(const ReadingListModel* model,
-                                             const ReadingListEntry& entry) {}
-
-  virtual void ReadingListWillAddReadEntry(const ReadingListModel* model,
-                                           const ReadingListEntry& entry) {}
-
  protected:
   ReadingListModelObserver() {}
   virtual ~ReadingListModelObserver() {}
 
   DISALLOW_COPY_AND_ASSIGN(ReadingListModelObserver);
 };
 
 #endif  // COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_OBSERVER_H_