Index: ios/chrome/browser/ui/main/main_view_controller.mm |
diff --git a/ios/chrome/browser/ui/main/main_view_controller.mm b/ios/chrome/browser/ui/main/main_view_controller.mm |
index 641b24568c1695c2bad673a3e44448e068750c3a..c48009b9f1e8c15a53611aa9b049ccc90582a83a 100644 |
--- a/ios/chrome/browser/ui/main/main_view_controller.mm |
+++ b/ios/chrome/browser/ui/main/main_view_controller.mm |
@@ -6,6 +6,10 @@ |
#import "base/logging.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
@implementation MainViewController |
- (UIViewController*)activeViewController { |