[ObjC ARC] Converts ios/chrome/browser/ui/settings:eg_tests to ARC.

ios/chrome/browser/ui/settings/translate_ui_egtest.mm

Index: ios/chrome/browser/ui/settings/translate_ui_egtest.mm
diff --git a/ios/chrome/browser/ui/settings/translate_ui_egtest.mm b/ios/chrome/browser/ui/settings/translate_ui_egtest.mm
index 1e30d3c502f01b835f001dcc7feff019458f5fd7..dd169c52948b86f70d3c8f97713e733de2c6a9c8 100644
--- a/ios/chrome/browser/ui/settings/translate_ui_egtest.mm
+++ b/ios/chrome/browser/ui/settings/translate_ui_egtest.mm
@@ -14,6 +14,10 @@
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 using chrome_test_util::NavigationBarDoneButton;
 
 namespace {