with sync

ios/chrome/browser/sync/ios_chrome_sync_client.mm

Index: ios/chrome/browser/sync/ios_chrome_sync_client.mm
diff --git a/ios/chrome/browser/sync/ios_chrome_sync_client.mm b/ios/chrome/browser/sync/ios_chrome_sync_client.mm
index 66d249ad4a64e1767829afcba65bc74505373b12..a7ce047e267f9fa21274a63164ccabed25d51eb4 100644
--- a/ios/chrome/browser/sync/ios_chrome_sync_client.mm
+++ b/ios/chrome/browser/sync/ios_chrome_sync_client.mm
@@ -52,6 +52,8 @@
 #include "ios/chrome/browser/invalidation/ios_chrome_profile_invalidation_provider_factory.h"
 #include "ios/chrome/browser/passwords/ios_chrome_password_store_factory.h"
 #include "ios/chrome/browser/pref_names.h"
+#include "ios/chrome/browser/reading_list/reading_list_model.h"
+#include "ios/chrome/browser/reading_list/reading_list_model_factory.h"
 #include "ios/chrome/browser/signin/oauth2_token_service_factory.h"
 #include "ios/chrome/browser/sync/glue/sync_start_util.h"
 #include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
@@ -335,6 +337,13 @@ IOSChromeSyncClient::GetModelTypeServiceForType(syncer::ModelType type) {
                  browser_state_)
           ->GetDeviceInfoService()
           ->AsWeakPtr();
+    case syncer::READING_LIST: {
+      ReadingListModel* reading_list_model =
+          ReadingListModelFactory::GetForBrowserState(browser_state_);
+      if (reading_list_model)
+        return reading_list_model->GetModelTypeService()->AsWeakPtr();
+      return base::WeakPtr<syncer::ModelTypeService>();
+    }
     default:
       NOTREACHED();
       return base::WeakPtr<syncer::ModelTypeService>();