chromeos/ash/components/network/fast_transition_observer.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROMEOS_ASH_COMPONENTS_NETWORK_FAST_TRANSITION_OBSERVER_H_
#define CHROMEOS_ASH_COMPONENTS_NETWORK_FAST_TRANSITION_OBSERVER_H_

#include <string>

#include "base/component_export.h"
#include "base/memory/raw_ptr.h"
#include "components/prefs/pref_change_registrar.h"

class PrefRegistrySimple;

namespace ash {

// FastTransitionObserver is a singleton, owned by
// `ChromeBrowserMainPartsAsh`.
// This class is responsible for propagating Fast Transition policy
// changes (prefs::kFastTransitionEnabled) in Chrome down to Shill.
class COMPONENT_EXPORT(CHROMEOS_NETWORK) FastTransitionObserver {
 public:
  explicit FastTransitionObserver(PrefService* local_state);

  FastTransitionObserver(const FastTransitionObserver&) = delete;
  FastTransitionObserver& operator=(const FastTransitionObserver&) = delete;

  ~FastTransitionObserver();

  static void RegisterPrefs(PrefRegistrySimple* registry);

 private:
  // Callback used when prefs::kFastTransitionEnabled changes
  void OnPreferenceChanged(const std::string& pref_name);

  raw_ptr<PrefService> local_state_;
  PrefChangeRegistrar pref_change_registrar_;
};

}  // namespace ash

#endif  // CHROMEOS_ASH_COMPONENTS_NETWORK_FAST_TRANSITION_OBSERVER_H_