Index: ios/chrome/browser/ui/toolbar/new_tab_button.mm |
diff --git a/ios/chrome/browser/ui/toolbar/new_tab_button.mm b/ios/chrome/browser/ui/toolbar/new_tab_button.mm |
index bde38a0e00a9402bd3c08334eae2305296884e57..ab29bcab140d046254f1d771c8cbd27b382adb7e 100644 |
--- a/ios/chrome/browser/ui/toolbar/new_tab_button.mm |
+++ b/ios/chrome/browser/ui/toolbar/new_tab_button.mm |
@@ -15,6 +15,10 @@ |
#include "ui/base/l10n/l10n_util.h" |
#include "ui/base/l10n/l10n_util_mac.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace { |
// Amount by which to inset the button's content. |
const CGFloat kContentInset = 6.0; |