Index: ios/chrome/browser/ui/UIView+SizeClassSupport.mm |
diff --git a/ios/chrome/browser/ui/UIView+SizeClassSupport.mm b/ios/chrome/browser/ui/UIView+SizeClassSupport.mm |
index f84cf7a8c38f311506a4c1eaf2dcfa7e3a666145..0dd65621d00dd7956217689abb8617fa18591f1e 100644 |
--- a/ios/chrome/browser/ui/UIView+SizeClassSupport.mm |
+++ b/ios/chrome/browser/ui/UIView+SizeClassSupport.mm |
@@ -8,6 +8,10 @@ |
#import "base/ios/ios_util.h" |
#import "ios/chrome/browser/ui/ui_util.h" |
+#if !defined(__has_feature) || !__has_feature(objc_arc) |
+#error "This file requires ARC support." |
+#endif |
+ |
namespace { |
// Returns the SizeClassIdiom corresponding with |size_class|. |