xref: /aosp_15_r20/external/cronet/components/metrics/entropy_state_provider.h (revision 6777b5387eb2ff775bb5750e3f5d96f37fb7352b)

// Copyright 2020 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_ENTROPY_STATE_PROVIDER_H_
#define COMPONENTS_METRICS_ENTROPY_STATE_PROVIDER_H_

#include "components/metrics/entropy_state.h"
#include "components/metrics/metrics_provider.h"

class PrefService;

namespace metrics {

// EntropyStateProvider adds information about low entropy sources in the system
// profile. This includes |low_entropy_source|, |old_low_entropy_source| and
// |pseudo_low_entropy_source|.
class EntropyStateProvider : public MetricsProvider {
 public:
  explicit EntropyStateProvider(PrefService* local_state);
  ~EntropyStateProvider() override;

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

  // Provides low entropy sources values to system profile in the client's
  // report. This function always provides the same low entropy source values
  // that are used for randomizing field trials throughout the session.
  void ProvideSystemProfileMetrics(
      SystemProfileProto* system_profile_proto) override;

 private:
  EntropyState entropy_state_;
};

}  // namespace metrics

#endif  // COMPONENTS_METRICS_ENTROPY_STATE_PROVIDER_H_