Index: ios/chrome/browser/ui/contextual_search/contextual_search_metrics.mm |
diff --git a/ios/chrome/browser/ui/contextual_search/contextual_search_metrics.mm b/ios/chrome/browser/ui/contextual_search/contextual_search_metrics.mm |
index 78224fdbeaf819b655ea1b2f46100a6fe13f56ac..a776d8785a661050fca6702e0ddf82ca06a4f92c 100644 |
--- a/ios/chrome/browser/ui/contextual_search/contextual_search_metrics.mm |
+++ b/ios/chrome/browser/ui/contextual_search/contextual_search_metrics.mm |
@@ -9,6 +9,10 @@ |
#include "base/metrics/histogram_macros.h" |
#include "base/time/time.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
using ContextualSearch::PanelState; |
using ContextualSearch::StateChangeReason; |