Index: ios/web/browser_state.mm |
diff --git a/ios/web/browser_state.mm b/ios/web/browser_state.mm |
index 5339a1e7016a3d9e5dfea7a19c086747e28d0a38..84dd70bea36d533be3706f3e824bb3df0aa41752 100644 |
--- a/ios/web/browser_state.mm |
+++ b/ios/web/browser_state.mm |
@@ -11,6 +11,10 @@ |
#include "ios/web/public/web_thread.h" |
#include "ios/web/webui/url_data_manager_ios_backend.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace web { |
namespace { |
// Private key used for safe conversion of base::SupportsUserData to |