chromium/components/sync/invalidations/fcm_registration_token_observer.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_SYNC_INVALIDATIONS_FCM_REGISTRATION_TOKEN_OBSERVER_H_
#define COMPONENTS_SYNC_INVALIDATIONS_FCM_REGISTRATION_TOKEN_OBSERVER_H_

#include "base/observer_list_types.h"

namespace syncer {

// An interface to observe changes on FCM registration token.
class FCMRegistrationTokenObserver : public base::CheckedObserver { … };

}  // namespace syncer

#endif  // COMPONENTS_SYNC_INVALIDATIONS_FCM_REGISTRATION_TOKEN_OBSERVER_H_