| // 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 "components/sync_device_info/device_count_metrics_provider.h" |
| |
| #include <algorithm> |
| |
| #include "base/metrics/histogram_functions.h" |
| #include "components/sync_device_info/device_info_tracker.h" |
| |
| namespace syncer { |
| |
| DeviceCountMetricsProvider::DeviceCountMetricsProvider( |
| const ProvideTrackersCallback& provide_trackers) |
| : provide_trackers_(provide_trackers) {} |
| |
| DeviceCountMetricsProvider::~DeviceCountMetricsProvider() {} |
| |
| int DeviceCountMetricsProvider::MaxActiveDeviceCount() const { |
| std::vector<const DeviceInfoTracker*> trackers; |
| provide_trackers_.Run(&trackers); |
| int max = 0; |
| for (auto* tracker : trackers) { |
| max = std::max(max, tracker->CountActiveDevices()); |
| } |
| return max; |
| } |
| |
| void DeviceCountMetricsProvider::ProvideCurrentSessionData( |
| metrics::ChromeUserMetricsExtension* uma_proto) { |
| base::UmaHistogramSparse("Sync.DeviceCount2", |
| std::min(MaxActiveDeviceCount(), 100)); |
| } |
| |
| } // namespace syncer |