chromium/components/metrics/metrics_state_manager.h

// Copyright 2014 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_METRICS_METRICS_STATE_MANAGER_H_
#define COMPONENTS_METRICS_METRICS_STATE_MANAGER_H_

#include <memory>
#include <string>
#include <string_view>

#include "base/callback_list.h"
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/metrics/field_trial.h"
#include "build/chromeos_buildflags.h"
#include "components/metrics/clean_exit_beacon.h"
#include "components/metrics/client_info.h"
#include "components/metrics/cloned_install_detector.h"
#include "components/metrics/entropy_state.h"
#include "components/variations/entropy_provider.h"

class PrefService;
class PrefRegistrySimple;

namespace metrics {

class EnabledStateProvider;
class MetricsProvider;

// Denotes whether this session is a background or foreground session at
// startup. May be unknown. A background session refers to the situation in
// which the browser process starts; does some work, e.g. servicing a sync; and
// ends without ever becoming visible. Note that the point in startup at which
// this value is determined is likely before the UI is visible.
//
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
enum class StartupVisibility { … };

// Denotes the type of EntropyProvider to use for default one-time
// randomization.
enum class EntropyProviderType { … };

// Options to apply to trial randomization.
struct EntropyParams { … };

// Responsible for managing MetricsService state prefs, specifically the UMA
// client id and low entropy source. Code outside the metrics directory should
// not be instantiating or using this class directly.
class MetricsStateManager final { … };

}  // namespace metrics

#endif  // COMPONENTS_METRICS_METRICS_STATE_MANAGER_H_