Index: ios/chrome/browser/ui/side_swipe_gesture_recognizer.mm |
diff --git a/ios/chrome/browser/ui/side_swipe_gesture_recognizer.mm b/ios/chrome/browser/ui/side_swipe_gesture_recognizer.mm |
index b4a463a9db0983458cd7896a51bb9c76617e3f58..0da4673669c037f8233241ada0740760cb722f18 100644 |
--- a/ios/chrome/browser/ui/side_swipe_gesture_recognizer.mm |
+++ b/ios/chrome/browser/ui/side_swipe_gesture_recognizer.mm |
@@ -8,6 +8,10 @@ |
#include "base/logging.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace { |
// The absolute maximum swipe angle from |x = y| for a swipe to begin. |