chromium/chrome/browser/metrics/desktop_session_duration/desktop_session_duration_tracker.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_METRICS_DESKTOP_SESSION_DURATION_DESKTOP_SESSION_DURATION_TRACKER_H_
#define CHROME_BROWSER_METRICS_DESKTOP_SESSION_DURATION_DESKTOP_SESSION_DURATION_TRACKER_H_

#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "chrome/browser/metrics/desktop_session_duration/audible_contents_tracker.h"
#include "chrome/browser/metrics/desktop_session_duration/chrome_visibility_observer.h"

namespace metrics {

// Class for tracking and recording session length on desktop based on browser
// visibility, audio and user interaction.
class DesktopSessionDurationTracker : public AudibleContentsTracker::Observer { … };

}  // namespace metrics

#endif  // CHROME_BROWSER_METRICS_DESKTOP_SESSION_DURATION_DESKTOP_SESSION_DURATION_TRACKER_H_