Reading List create protobuf store

ios/chrome/browser/reading_list/reading_list_model.h

Index: ios/chrome/browser/reading_list/reading_list_model.h
diff --git a/ios/chrome/browser/reading_list/reading_list_model.h b/ios/chrome/browser/reading_list/reading_list_model.h
index 9dc2d38240121d75af757cbab94eedcd46297039..44d17aa88590b6bb6743b1a8622aa05a089e6f4d 100644
--- a/ios/chrome/browser/reading_list/reading_list_model.h
+++ b/ios/chrome/browser/reading_list/reading_list_model.h
@@ -16,11 +16,16 @@
 
 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
@@ -118,6 +123,12 @@ class ReadingListModel {
   // 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_;