Creating protobuf for reading list sync

components/sync/driver/model_association_manager.cc

Index: components/sync/driver/model_association_manager.cc
diff --git a/components/sync/driver/model_association_manager.cc b/components/sync/driver/model_association_manager.cc
index 66829b58db9af1f7d4f2c46b6da1be6808e1f621..6ec96374e13fef1a2cd067b1b734a5182f35fdd4 100644
--- a/components/sync/driver/model_association_manager.cc
+++ b/components/sync/driver/model_association_manager.cc
@@ -44,12 +44,13 @@ static const syncer::ModelType kStartOrder[] = {
                                //  might block creating a new supervised user,
                                //  so we want to do it early.
     syncer::PREFERENCES, syncer::PRIORITY_PREFERENCES, syncer::EXTENSIONS,
-    syncer::APPS, syncer::APP_LIST, syncer::ARC_PACKAGE, syncer::THEMES,
-    syncer::SEARCH_ENGINES, syncer::SESSIONS, syncer::APP_NOTIFICATIONS,
-    syncer::DICTIONARY, syncer::FAVICON_IMAGES, syncer::FAVICON_TRACKING,
-    syncer::PRINTERS, syncer::SUPERVISED_USER_SETTINGS,
-    syncer::SUPERVISED_USER_SHARED_SETTINGS, syncer::SUPERVISED_USER_WHITELISTS,
-    syncer::ARTICLES, syncer::WIFI_CREDENTIALS,
+    syncer::APPS, syncer::APP_LIST, syncer::ARC_PACKAGE, syncer::READING_LIST,
+    syncer::THEMES, syncer::SEARCH_ENGINES, syncer::SESSIONS,
+    syncer::APP_NOTIFICATIONS, syncer::DICTIONARY, syncer::FAVICON_IMAGES,
+    syncer::FAVICON_TRACKING, syncer::PRINTERS,
+    syncer::SUPERVISED_USER_SETTINGS, syncer::SUPERVISED_USER_SHARED_SETTINGS,
+    syncer::SUPERVISED_USER_WHITELISTS, syncer::ARTICLES,
+    syncer::WIFI_CREDENTIALS,
 };
 
 static_assert(arraysize(kStartOrder) ==