1 // Copyright 2016 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef COMPONENTS_METRICS_SAMPLING_METRICS_PROVIDER_H_ 6 #define COMPONENTS_METRICS_SAMPLING_METRICS_PROVIDER_H_ 7 8 #include "components/metrics/metrics_provider.h" 9 10 namespace metrics { 11 12 // Provides metrics related to sampling of metrics reporting clients. In 13 // particular, the rate at which clients are sampled. 14 class SamplingMetricsProvider : public MetricsProvider { 15 public: 16 // |sampling_rate_per_mille| is the number of clients per 1000 that are in the 17 // sample. 18 explicit SamplingMetricsProvider(int sampling_rate_per_mille); 19 ~SamplingMetricsProvider() override = default; 20 SamplingMetricsProvider(const SamplingMetricsProvider&) = delete; 21 SamplingMetricsProvider operator=(const SamplingMetricsProvider&) = delete; 22 23 private: 24 // MetricsProvider: 25 void ProvideStabilityMetrics( 26 SystemProfileProto* system_profile_proto) override; 27 28 int sampling_rate_per_mille_; 29 }; 30 31 } // namespace metrics 32 33 #endif // COMPONENTS_METRICS_SAMPLING_METRICS_PROVIDER_H_ 34