chromium/chrome/browser/resource_coordinator/usage_clock.h

// Copyright 2018 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_RESOURCE_COORDINATOR_USAGE_CLOCK_H_
#define CHROME_BROWSER_RESOURCE_COORDINATOR_USAGE_CLOCK_H_

#include "base/time/time.h"
#include "chrome/browser/metrics/desktop_session_duration/desktop_session_duration_tracker.h"

namespace resource_coordinator {

// A clock that advances when Chrome is in use.
//
// See metrics::DesktopSessionDurationTracker for how Chrome usage is tracked.
// If metrics::DesktopSessionDurationTracker isn't initialized before this, the
// clock will advance continuously, regardless of Chrome usage. This avoids
// forcing all tests that indirectly depend on this to initialize
// metrics::DesktopSessionDurationTracker.
class UsageClock
    : public metrics::DesktopSessionDurationTracker::Observer
{ … };

}  // namespace resource_coordinator

#endif  // CHROME_BROWSER_RESOURCE_COORDINATOR_USAGE_CLOCK_H_