arc: Notify ARC instance failures via callbacks.

components/arc/user_data/arc_user_data_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 COMPONENTS_ARC_USER_DATA_ARC_USER_DATA_SERVICE
 #define COMPONENTS_ARC_USER_DATA_ARC_USER_DATA_SERVICE
 
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "components/arc/arc_bridge_service.h"
@@ skipping 12 matching lines @@
  public:
   explicit ArcUserDataService(
       ArcBridgeService* arc_bridge_service,
       std::unique_ptr<BooleanPrefMember> arc_enabled_pref,
       const AccountId& account_id);
   ~ArcUserDataService() override;
 
   // ArcBridgeService::Observer:
   // Called whenever the arc bridge is stopped to potentially remove data if
   // the user has not opted in.
-  void OnBridgeStopped() override;
+  void OnBridgeStopped(ArcBridgeService::StopReason reason) override;
 
  private:
   base::ThreadChecker thread_checker_;
 
   // Checks if ARC is both stopped and disabled (not opt-in) and triggers
   // removal of user data if both conditions are true.
   void ClearIfDisabled();
 
   const std::unique_ptr<BooleanPrefMember> arc_enabled_pref_;
 
   // Account ID for the account for which we currently have opt-in information.
   AccountId primary_user_account_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcUserDataService);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_USER_DATA_ARC_USER_DATA_SERVICE