Index: ios/chrome/test/app/histogram_test_util.mm |
diff --git a/ios/chrome/test/app/histogram_test_util.mm b/ios/chrome/test/app/histogram_test_util.mm |
index 000415e11365b90a73ee4b554299b27b7b82be72..ac5e62e7fbac3bc41b58463d8e120143e70d3c9d 100644 |
--- a/ios/chrome/test/app/histogram_test_util.mm |
+++ b/ios/chrome/test/app/histogram_test_util.mm |
@@ -14,6 +14,10 @@ |
#include "base/metrics/statistics_recorder.h" |
#include "base/stl_util.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace { |
base::HistogramBase* FindHistogram(const std::string& name, |
FailureBlock failure_block) { |