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content / browser / xr / metrics / session_timer.cc [blame]
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/xr/metrics/session_timer.h"
#include "base/metrics/histogram_functions.h"
namespace content {
SessionTimer::SessionTimer(size_t trace_id) : trace_id_(trace_id) {}
SessionTimer::~SessionTimer() {
StopSession();
}
size_t SessionTimer::GetTraceId() {
return trace_id_;
}
base::Time SessionTimer::GetStartTime() {
return start_time_;
}
void SessionTimer::StartSession() {
DCHECK(start_time_.is_null())
<< "Must stop existing session before starting a new one";
start_time_ = base::Time::Now();
}
void SessionTimer::StopSession() {
if (start_time_.is_null()) {
return;
}
// Calculate the duration of the session.
base::TimeDelta session_duration = base::Time::Now() - start_time_;
if (!session_duration.is_zero()) {
// TODO(crbug.com/40677123): Consider renaming the timers to
// something that indicates both that these also record AR, and that these
// are no longer "suffixed" histograms.
base::UmaHistogramCustomTimes("VRSessionTime.WebVR", session_duration,
base::TimeDelta(), base::Hours(5), 100);
}
start_time_ = base::Time();
trace_id_ = 0;
}
} // namespace content