Reading List create protobuf store

ios/chrome/browser/reading_list/reading_list_model.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 IOS_CHROME_BROWSER_READING_LIST_READING_LIST_MODEL_H_
 #define IOS_CHROME_BROWSER_READING_LIST_READING_LIST_MODEL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/observer_list.h"
 #include "ios/chrome/browser/reading_list/reading_list_entry.h"
 #include "ios/chrome/browser/reading_list/reading_list_model_observer.h"
 
 class GURL;
 class ReadingListModel;
+class ReadingListStore;
 
 namespace ios {
 class ChromeBrowserState;
 }
 
+namespace syncer {
+class SyncableService;
+}
+
 // The reading list model contains two list of entries: one of unread urls, the
 // other of read ones. This object should only be accessed from one thread
 // (Usually the main thread). The observers callbacks are also sent on the main
 // thread.
 class ReadingListModel {
  public:
   class ScopedReadingListBatchUpdate;
   // Returns true if the model finished loading. Until this returns true the
   // reading list is not ready for use.
   virtual bool loaded() const = 0;
@@ skipping 77 matching lines @@
   ReadingListModel();
   virtual ~ReadingListModel();
 
   // The observers.
   base::ObserverList<ReadingListModelObserver> observers_;
 
   // Tells model that batch updates have completed. Called from
   // ReadingListBatchUpdateToken dtor.
   virtual void EndBatchUpdates();
 
+  // Called when model is entering batch update mode.
+  virtual void EnteringBatchUpdates();
+
+  // Called when model is leaving batch update mode.
+  virtual void LeavingBatchUpdates();
+
  private:
   unsigned int current_batch_updates_count_;
 
   DISALLOW_COPY_AND_ASSIGN(ReadingListModel);
 };
 
 #endif  // IOS_CHROME_BROWSER_READING_LIST_READING_LIST_MODEL_H_