Componentize chrome/browser/sync/backup_rollback_controller

chrome/browser/sync/backup_rollback_controller.h

-// Copyright 2014 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_SYNC_BACKUP_ROLLBACK_CONTROLLER_H_
-#define CHROME_BROWSER_SYNC_BACKUP_ROLLBACK_CONTROLLER_H_
-
-#include "base/callback.h"
-#include "base/memory/weak_ptr.h"
-
-class SigninManagerWrapper;
-
-namespace sync_driver {
-class SyncPrefs;
-}
-
-namespace browser_sync {
-
-// BackupRollbackController takes two closures for starting backup/rollback
-// process. It calls the closures according to user's signin status or
-// received rollback command. Backup is not run when user signed in, even when
-// sync is not running.
-class BackupRollbackController {
- public:
-  BackupRollbackController(sync_driver::SyncPrefs* sync_prefs,
-                           const SigninManagerWrapper* signin,
-                           base::Closure start_backup,
-                           base::Closure start_rollback);
-  ~BackupRollbackController();
-
-  // Post task to run |start_backup_| if conditions are met. Return true if
-  // task is posted, false otherwise.
-  bool StartBackup();
-
-  // Post task to run |start_rollback_| if conditions are met. Return true if
-  // task is posted, false otherwise.
-  bool StartRollback();
-
-  // Update rollback preference to indicate rollback is needed.
-  void OnRollbackReceived();
-
-  // Update rollback preference to indicate rollback is finished.
-  void OnRollbackDone();
-
-  // Return true if platform supports backup and backup is enabled.
-  static bool IsBackupEnabled();
-
- private:
-  sync_driver::SyncPrefs* sync_prefs_;
-
-  // Use SigninManagerWrapper instead of SigninManagerBase so that
-  // supervised users are treated like regular signed-in users.
-  const SigninManagerWrapper* signin_;
-
-  base::Closure start_backup_;
-  base::Closure start_rollback_;
-
-  DISALLOW_COPY_AND_ASSIGN(BackupRollbackController);
-};
-
-}  // namespace browser_sync
-
-#endif  // CHROME_BROWSER_SYNC_BACKUP_ROLLBACK_CONTROLLER_H_