| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/metrics/sampling_metrics_provider.h" |
| |
| #include "base/metrics/sparse_histogram.h" |
| #include "chrome/browser/metrics/chrome_metrics_services_manager_client.h" |
| #include "components/metrics/metrics_provider.h" |
| |
| namespace metrics { |
| |
| SamplingMetricsProvider::SamplingMetricsProvider() {} |
| SamplingMetricsProvider::~SamplingMetricsProvider() {} |
| |
| void SamplingMetricsProvider::ProvideStabilityMetrics( |
| SystemProfileProto* system_profile_proto) { |
| int sample_rate; |
| // Only log the sample rate if it's defined. |
| if (ChromeMetricsServicesManagerClient::GetSamplingRatePerMille( |
| &sample_rate)) { |
| base::HistogramBase* histogram = base::SparseHistogram::FactoryGet( |
| "UMA.SamplingRatePerMille", |
| base::HistogramBase::kUmaStabilityHistogramFlag); |
| histogram->Add(sample_rate); |
| } |
| } |
| |
| } // namespace metrics |