chromium/components/metrics/file_metrics_provider.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 COMPONENTS_METRICS_FILE_METRICS_PROVIDER_H_
#define COMPONENTS_METRICS_FILE_METRICS_PROVIDER_H_

#include <stddef.h>

#include <list>
#include <memory>
#include <string_view>
#include <vector>

#include "base/files/file_path.h"
#include "base/functional/callback_forward.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/metrics/statistics_recorder.h"
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "components/metrics/metrics_provider.h"

class PrefRegistrySimple;
class PrefService;

namespace metrics {

// FileMetricsProvider gathers and logs histograms written to files on disk.
// Any number of files can be registered and will be polled once per upload
// cycle (at startup and periodically thereafter -- about every 30 minutes
// for desktop) for data to send.
class FileMetricsProvider : public MetricsProvider,
                            public base::StatisticsRecorder::HistogramProvider { … };

}  // namespace metrics

#endif  // COMPONENTS_METRICS_FILE_METRICS_PROVIDER_H_