Index: ios/chrome/common/physical_web/physical_web_types.mm |
diff --git a/ios/chrome/common/physical_web/physical_web_types.mm b/ios/chrome/common/physical_web/physical_web_types.mm |
index c4b9a1a8d11f1750b4f0ffe01d443c5a9ff9be0d..5b47095724112286160e5788a205324d7cecf700 100644 |
--- a/ios/chrome/common/physical_web/physical_web_types.mm |
+++ b/ios/chrome/common/physical_web/physical_web_types.mm |
@@ -4,6 +4,10 @@ |
#import "ios/chrome/common/physical_web/physical_web_types.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace physical_web { |
NSString* const kPhysicalWebErrorDomain = @"kPhysicalWebErrorDomain"; |