| Index: ios/chrome/browser/web/browsing_prevent_default_egtest.mm | 
| diff --git a/ios/chrome/browser/web/browsing_prevent_default_egtest.mm b/ios/chrome/browser/web/browsing_prevent_default_egtest.mm | 
| index 87a96c66b0aef4bd8482463d2de8972b3d7dbe26..1fe2b769a205fb16a77a8a9c2db7cbe9ec415fb8 100644 | 
| --- a/ios/chrome/browser/web/browsing_prevent_default_egtest.mm | 
| +++ b/ios/chrome/browser/web/browsing_prevent_default_egtest.mm | 
| @@ -20,6 +20,10 @@ | 
| #include "ios/web/public/test/http_server_util.h" | 
| #include "url/url_constants.h" | 
|  | 
| +#if !defined(__has_feature) || !__has_feature(objc_arc) | 
| +#error "This file requires ARC support." | 
| +#endif | 
| + | 
| namespace { | 
|  | 
| // Timeout to use when waiting for a condition to be true. | 
|  |