chromium/components/system_media_controls/system_media_controls_observer.h

// Copyright 2019 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_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_OBSERVER_H_
#define COMPONENTS_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_OBSERVER_H_

#include "base/component_export.h"
#include "base/observer_list_types.h"

namespace base {
class TimeDelta;
}

namespace system_media_controls {

class SystemMediaControls;

// Interface to observe events on the SystemMediaControls.
class COMPONENT_EXPORT(SYSTEM_MEDIA_CONTROLS) SystemMediaControlsObserver
    : public base::CheckedObserver { … };

}  // namespace system_media_controls

#endif  // COMPONENTS_SYSTEM_MEDIA_CONTROLS_SYSTEM_MEDIA_CONTROLS_OBSERVER_H_