Index: ios/chrome/browser/ui/util/top_view_controller.mm |
diff --git a/ios/chrome/browser/ui/util/top_view_controller.mm b/ios/chrome/browser/ui/util/top_view_controller.mm |
index 332c405ea5ff5d5d6521ddc69196d59b479a0109..7bfe126284e6c5f5116d83cce16adf2f4027a26c 100644 |
--- a/ios/chrome/browser/ui/util/top_view_controller.mm |
+++ b/ios/chrome/browser/ui/util/top_view_controller.mm |
@@ -4,6 +4,10 @@ |
#import "ios/chrome/browser/ui/util/top_view_controller.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace top_view_controller { |
UIViewController* TopPresentedViewController() { |