38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
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// Copyright 2023 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef COMPONENTS_METRICS_PERSISTENT_SYNTHETIC_TRIAL_OBSERVER_H_
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#define COMPONENTS_METRICS_PERSISTENT_SYNTHETIC_TRIAL_OBSERVER_H_
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#include "base/task/sequenced_task_runner.h"
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#include "components/variations/synthetic_trials.h"
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namespace metrics {
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// Stores synthetic field trials to persistent storage when they are updated.
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class PersistentSyntheticTrialObserver
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: public variations::SyntheticTrialObserver {
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public:
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PersistentSyntheticTrialObserver();
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~PersistentSyntheticTrialObserver() override;
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PersistentSyntheticTrialObserver(const PersistentSyntheticTrialObserver&) =
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delete;
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PersistentSyntheticTrialObserver& operator=(
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const PersistentSyntheticTrialObserver&) = delete;
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// SyntheticTrialObserver impl:
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void OnSyntheticTrialsChanged(
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const std::vector<variations::SyntheticTrialGroup>& trials_updated,
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const std::vector<variations::SyntheticTrialGroup>& trials_removed,
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const std::vector<variations::SyntheticTrialGroup>& groups) override;
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private:
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scoped_refptr<base::SequencedTaskRunner> task_runner_;
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};
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} // namespace metrics
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#endif // COMPONENTS_METRICS_PERSISTENT_SYNTHETIC_TRIAL_OBSERVER_H_
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