Index: ios/web/web_state/global_web_state_event_tracker.mm |
diff --git a/ios/web/web_state/global_web_state_event_tracker.mm b/ios/web/web_state/global_web_state_event_tracker.mm |
index 9a51bf5f0392717fa1b4896fd579115cf40a9129..267b38c1046fcc41d68e98873f3ee3b635bc5c70 100644 |
--- a/ios/web/web_state/global_web_state_event_tracker.mm |
+++ b/ios/web/web_state/global_web_state_event_tracker.mm |
@@ -11,6 +11,10 @@ |
#include "ios/web/public/web_state/web_state_observer.h" |
#include "ios/web/public/web_state/web_state_user_data.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace web { |
class WebStateEventForwarder; |