Index: ios/web/active_state_manager_impl.mm |
diff --git a/ios/web/active_state_manager_impl.mm b/ios/web/active_state_manager_impl.mm |
index ca0fadc24b01a9be54c7211805a5eb39c24b7982..d2f3b1edfd4da8a1a3b4fdf2e90d405c676e2193 100644 |
--- a/ios/web/active_state_manager_impl.mm |
+++ b/ios/web/active_state_manager_impl.mm |
@@ -8,6 +8,10 @@ |
#include "ios/web/public/browser_state.h" |
#include "ios/web/public/web_thread.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace web { |
namespace { |