Remove unused ArcUserDataService.

components/arc/user_data/arc_user_data_service.h

Index: components/arc/user_data/arc_user_data_service.h
diff --git a/components/arc/user_data/arc_user_data_service.h b/components/arc/user_data/arc_user_data_service.h
deleted file mode 100644
index 1ac89a2be75e938de2cfeb23670db9541d50009c..0000000000000000000000000000000000000000
--- a/components/arc/user_data/arc_user_data_service.h
+++ /dev/null
@@ -1,84 +0,0 @@
-// 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_H_
-#define COMPONENTS_ARC_USER_DATA_ARC_USER_DATA_SERVICE_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/thread_checker.h"
-#include "chromeos/dbus/session_manager_client.h"
-#include "components/arc/arc_bridge_service.h"
-#include "components/arc/arc_service.h"
-#include "components/prefs/pref_change_registrar.h"
-#include "components/prefs/pref_member.h"
-#include "components/signin/core/account_id/account_id.h"
-
-namespace arc {
-
-class ArcBridgeService;
-
-// This class controls the lifecycle of ARC user data, removing it when
-// necessary.
-class ArcUserDataService : public ArcService,
-                           public ArcBridgeService::Observer {
- public:
-  explicit ArcUserDataService(
-      ArcBridgeService* arc_bridge_service,
-      std::unique_ptr<BooleanPrefMember> arc_enabled_pref,
-      const AccountId& account_id);
-  ~ArcUserDataService() override;
-
-  using ArcDataCallback = chromeos::SessionManagerClient::ArcCallback;
-
-  // ArcBridgeService::Observer:
-  // Called whenever the arc bridge is stopped to potentially wipe data if
-  // the user has not opted in or it is required.
-  void OnBridgeStopped(ArcBridgeService::StopReason reason) override;
-
-  // Requires to wipe ARC user data after the next ARC bridge shutdown and call
-  // |callback| with an operation result.
-  void RequireUserDataWiped(const ArcDataCallback& callback);
-
- private:
-  base::ThreadChecker thread_checker_;
-
-  // Checks if ARC is both stopped and disabled (not opt-in) or data wipe is
-  // required and triggers removal of user data.
-  void WipeIfRequired();
-
-  // Callback when the kArcEnabled preference changes. It watches for instances
-  // where the preference is disabled and remembers this so that it can wipe
-  // user data once the bridge has stopped.
-  void OnOptInPreferenceChanged();
-
-  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_;
-
-  // Registrar used to monitor ARC enabled state.
-  PrefChangeRegistrar pref_change_registrar_;
-
-  // Set to true when kArcEnabled goes from true to false or user data wipe is
-  // required and set to false again after user data has been wiped.
-  // This ensures data is wiped even if the user tries to enable ARC before the
-  // bridge has shut down.
-  bool arc_user_data_wipe_required_ = false;
-
-  // Callback object that is passed to RemoveArcData to be invoked with a
-  // result of ARC user data wipe.
-  // Set when ARC user data wipe is required by RequireUserDataWiped.
-  ArcDataCallback callback_;
-
-  base::WeakPtrFactory<ArcUserDataService> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(ArcUserDataService);
-};
-
-}  // namespace arc
-
-#endif  // COMPONENTS_ARC_USER_DATA_ARC_USER_DATA_SERVICE_H_