Index: ios/chrome/browser/ui/stack_view/card_stack_pinch_gesture_recognizer.mm |
diff --git a/ios/chrome/browser/ui/stack_view/card_stack_pinch_gesture_recognizer.mm b/ios/chrome/browser/ui/stack_view/card_stack_pinch_gesture_recognizer.mm |
index d5a8021114b9d518ba06eba10ebdacbef6c565c3..ad6727feb0af9e34da776db2038c34105293a879 100644 |
--- a/ios/chrome/browser/ui/stack_view/card_stack_pinch_gesture_recognizer.mm |
+++ b/ios/chrome/browser/ui/stack_view/card_stack_pinch_gesture_recognizer.mm |
@@ -6,6 +6,10 @@ |
#include "base/logging.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
@interface CardStackPinchGestureRecognizer () |
// Returns the number of non-ended, non-cancelled touches in |event|. |