chromium/chrome/browser/performance_manager/public/user_tuning/user_performance_tuning_manager.h

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_PERFORMANCE_MANAGER_PUBLIC_USER_TUNING_USER_PERFORMANCE_TUNING_MANAGER_H_
#define CHROME_BROWSER_PERFORMANCE_MANAGER_PUBLIC_USER_TUNING_USER_PERFORMANCE_TUNING_MANAGER_H_

#include <memory>

#include "base/memory/ref_counted.h"
#include "base/observer_list.h"
#include "base/observer_list_types.h"
#include "base/scoped_observation.h"
#include "base/time/time.h"
#include "chrome/browser/performance_manager/user_tuning/user_performance_tuning_notifier.h"
#include "chrome/browser/resource_coordinator/lifecycle_unit_state.mojom-shared.h"
#include "components/performance_manager/public/user_tuning/prefs.h"
#include "components/prefs/pref_change_registrar.h"
#include "content/public/browser/web_contents_user_data.h"

class ChromeBrowserMainExtraPartsPerformanceManager;
class PerformanceManagerMetricsProviderTest;
class PrefService;

namespace performance_manager::user_tuning {

// This singleton is responsible for managing the state of memory saver mode,
// as well as the different signals surrounding its toggling.
//
// It is created and owned by `ChromeBrowserMainExtraPartsPerformanceManager`
// and initialized in 2 parts:
// - Created in PostCreateThreads (so that UI can start observing it as soon as
// the first views are created) and
// - Starts to manage the mode when Start() is called in PreMainMessageLoopRun.
//
// This object lives on the main thread and should be used from it exclusively.
class UserPerformanceTuningManager { … };

}  // namespace performance_manager::user_tuning

#endif  // CHROME_BROWSER_PERFORMANCE_MANAGER_PUBLIC_USER_TUNING_USER_PERFORMANCE_TUNING_MANAGER_H_