Revert of [ObjC ARC] Converts ios/chrome/browser/ui/autofill:autofill to ARC.

ios/chrome/browser/ui/autofill/autofill_client_ios.mm

Index: ios/chrome/browser/ui/autofill/autofill_client_ios.mm
diff --git a/ios/chrome/browser/ui/autofill/autofill_client_ios.mm b/ios/chrome/browser/ui/autofill/autofill_client_ios.mm
index 7cb15de07b786574cb06a518962af46677e159bd..9447a8fdcf0637a7195080741ce62b7dee0b8f26 100644
--- a/ios/chrome/browser/ui/autofill/autofill_client_ios.mm
+++ b/ios/chrome/browser/ui/autofill/autofill_client_ios.mm
@@ -6,6 +6,7 @@
 
 #include <utility>
 
+#include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "components/autofill/core/browser/autofill_credit_card_filling_infobar_delegate_mobile.h"
 #include "components/autofill/core/browser/autofill_save_card_infobar_delegate_mobile.h"
@@ -26,10 +27,6 @@
 #include "ios/chrome/browser/web_data_service_factory.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
 namespace autofill {
 
 AutofillClientIOS::AutofillClientIOS(