Index: ios/chrome/browser/experimental_flags.mm |
diff --git a/ios/chrome/browser/experimental_flags.mm b/ios/chrome/browser/experimental_flags.mm |
index 5dd2c089871b1778625e76fa4f04cf3d3b678cfb..b6e3ff20f89ef8f4e010e20a72639190ef7da230 100644 |
--- a/ios/chrome/browser/experimental_flags.mm |
+++ b/ios/chrome/browser/experimental_flags.mm |
@@ -22,6 +22,10 @@ |
#include "ios/chrome/browser/chrome_switches.h" |
#include "ios/web/public/web_view_creation_util.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace { |
NSString* const kEnableAlertOnBackgroundUpload = |