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// Copyright 2023 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_PERSISTENT_SYNTHETIC_TRIAL_OBSERVER_H_
#define COMPONENTS_METRICS_PERSISTENT_SYNTHETIC_TRIAL_OBSERVER_H_
#include "base/task/sequenced_task_runner.h"
#include "components/variations/synthetic_trials.h"
namespace metrics {
// Stores synthetic field trials to persistent storage when they are updated.
class PersistentSyntheticTrialObserver
: public variations::SyntheticTrialObserver {
public:
PersistentSyntheticTrialObserver();
~PersistentSyntheticTrialObserver() override;
PersistentSyntheticTrialObserver(const PersistentSyntheticTrialObserver&) =
delete;
PersistentSyntheticTrialObserver& operator=(
const PersistentSyntheticTrialObserver&) = delete;
// SyntheticTrialObserver impl:
void OnSyntheticTrialsChanged(
const std::vector<variations::SyntheticTrialGroup>& trials_updated,
const std::vector<variations::SyntheticTrialGroup>& trials_removed,
const std::vector<variations::SyntheticTrialGroup>& groups) override;
private:
scoped_refptr<base::SequencedTaskRunner> task_runner_;
};
} // namespace metrics
#endif // COMPONENTS_METRICS_PERSISTENT_SYNTHETIC_TRIAL_OBSERVER_H_
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