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 0dd443803fcd8b685ba6909af2d03949e0c27229..f875c3d6bf43e447afa695fb52b10eb1ccd6f619 100644 |
--- a/ios/chrome/browser/ui/contextual_search/contextual_search_metrics.mm |
+++ b/ios/chrome/browser/ui/contextual_search/contextual_search_metrics.mm |
@@ -10,6 +10,10 @@ |
#include "base/metrics/user_metrics.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; |