Reading List create protobuf store

ios/chrome/browser/reading_list/reading_list_model.cc

Index: ios/chrome/browser/reading_list/reading_list_model.cc
diff --git a/ios/chrome/browser/reading_list/reading_list_model.cc b/ios/chrome/browser/reading_list/reading_list_model.cc
index 073ec3b759bcd874dbe77596632d27bf012f54d7..a9e911f2a4bde254691ec82246c9e8cf799c631e 100644
--- a/ios/chrome/browser/reading_list/reading_list_model.cc
+++ b/ios/chrome/browser/reading_list/reading_list_model.cc
@@ -5,6 +5,7 @@
 #include "ios/chrome/browser/reading_list/reading_list_model.h"
 
 ReadingListModel::ReadingListModel() : current_batch_updates_count_(0) {}
+
 ReadingListModel::~ReadingListModel() {}
 
 // Observer methods.
@@ -32,17 +33,25 @@ ReadingListModel::BeginBatchUpdates() {
 
   ++current_batch_updates_count_;
   if (current_batch_updates_count_ == 1) {
-    FOR_EACH_OBSERVER(ReadingListModelObserver, observers_,
-                      ReadingListModelBeganBatchUpdates(this));
+    EnteringBatchUpdates();
   }
   return token;
 }
 
+void ReadingListModel::EnteringBatchUpdates() {
+  FOR_EACH_OBSERVER(ReadingListModelObserver, observers_,
+                    ReadingListModelBeganBatchUpdates(this));
+}
+
 void ReadingListModel::EndBatchUpdates() {
   DCHECK(IsPerformingBatchUpdates());
   --current_batch_updates_count_;
   if (current_batch_updates_count_ == 0) {
-    FOR_EACH_OBSERVER(ReadingListModelObserver, observers_,
-                      ReadingListModelCompletedBatchUpdates(this));
+    LeavingBatchUpdates();
   }
 }
+
+void ReadingListModel::LeavingBatchUpdates() {
+  FOR_EACH_OBSERVER(ReadingListModelObserver, observers_,
+                    ReadingListModelCompletedBatchUpdates(this));
+}