| Index: ios/chrome/browser/sync/BUILD.gn | 
| diff --git a/ios/chrome/browser/sync/BUILD.gn b/ios/chrome/browser/sync/BUILD.gn | 
| index 16d626da8a7c3ee6611a7fafd93ec02bbab9116c..9eb6181a8e8415b11ef19f14dd7242973156f58b 100644 | 
| --- a/ios/chrome/browser/sync/BUILD.gn | 
| +++ b/ios/chrome/browser/sync/BUILD.gn | 
| @@ -11,6 +11,8 @@ source_set("sync") { | 
| "ios_chrome_sync_client.mm", | 
| "ios_chrome_synced_tab_delegate.h", | 
| "ios_chrome_synced_tab_delegate.mm", | 
| +    "ios_user_event_service_factory.cc", | 
| +    "ios_user_event_service_factory.h", | 
| "sync_observer_bridge.h", | 
| "sync_observer_bridge.mm", | 
| "sync_setup_service.cc", | 
|  |