Show different error message if ARC is disabled.

chrome/browser/chromeos/arc/arc_auth_service.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_SERVICE_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "components/arc/arc_service.h"
 #include "components/arc/common/auth.mojom.h"
 #include "components/arc/instance_holder.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace arc {
 
 class ArcAuthInfoFetcher;
+enum class ArcAuthInfoFetchStatus;
 
 // Implementation of ARC authorization.
 // TODO(hidehiko): Move to c/b/c/arc/auth with adding tests.
 class ArcAuthService : public ArcService,
                        public mojom::AuthHost,
                        public InstanceHolder<mojom::AuthInstance>::Observer {
  public:
   explicit ArcAuthService(ArcBridgeService* bridge_service);
   ~ArcAuthService() override;
 
@@ skipping 24 matching lines @@
 
  private:
   using AccountInfoCallback = base::Callback<void(mojom::AccountInfoPtr)>;
   class AccountInfoNotifier;
 
   // Starts to request account info.
   void RequestAccountInfoInternal(
       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);
 
   mojo::Binding<mojom::AuthHost> binding_;
 
   std::unique_ptr<AccountInfoNotifier> notifier_;
   std::unique_ptr<ArcAuthInfoFetcher> fetcher_;
 
   base::WeakPtrFactory<ArcAuthService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAuthService);
 };
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_SERVICE_H_