MediaStreamTrackMetricsHost 20 content/browser/renderer_host/media/media_stream_track_metrics_host.cc MediaStreamTrackMetricsHost::MediaStreamTrackMetricsHost() MediaStreamTrackMetricsHost 24 content/browser/renderer_host/media/media_stream_track_metrics_host.cc MediaStreamTrackMetricsHost::~MediaStreamTrackMetricsHost() {