Show different error message if ARC is disabled.

chrome/browser/chromeos/arc/arc_auth_service.h

Index: chrome/browser/chromeos/arc/arc_auth_service.h
diff --git a/chrome/browser/chromeos/arc/arc_auth_service.h b/chrome/browser/chromeos/arc/arc_auth_service.h
index b61927a80bbfe3d58eb15e25be1622f767f7d13d..853ebf3e70917ab1d801a17cf5917c3686187111 100644
--- a/chrome/browser/chromeos/arc/arc_auth_service.h
+++ b/chrome/browser/chromeos/arc/arc_auth_service.h
@@ -18,6 +18,7 @@
 namespace arc {
 
 class ArcAuthInfoFetcher;
+enum class ArcAuthInfoFetchStatus;
 
 // Implementation of ARC authorization.
 // TODO(hidehiko): Move to c/b/c/arc/auth with adding tests.
@@ -62,8 +63,10 @@ class ArcAuthService : public ArcService,
       std::unique_ptr<AccountInfoNotifier> account_info_notifier);
 
   // Callbacks when auth info is fetched.
-  void OnEnrollmentTokenFetched(const std::string& enrollment_token);
-  void OnAuthCodeFetched(const std::string& auth_code);
+  void OnEnrollmentTokenFetched(ArcAuthInfoFetchStatus status,
+                                const std::string& enrollment_token);
+  void OnAuthCodeFetched(ArcAuthInfoFetchStatus status,
+                         const std::string& auth_code);
 
   // Called to let ARC container know the account info.
   void OnAccountInfoReady(mojom::AccountInfoPtr account_info);