chromium/content/browser/media/audible_metrics.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 CONTENT_BROWSER_MEDIA_AUDIBLE_METRICS_H_
#define CONTENT_BROWSER_MEDIA_AUDIBLE_METRICS_H_

#include <list>
#include <memory>
#include <set>

#include "base/memory/raw_ptr.h"
#include "base/time/tick_clock.h"
#include "base/time/time.h"
#include "content/common/content_export.h"

namespace content {

class WebContents;

// This class handles metrics regarding audible WebContents.
// It records four different histograms:
// - how many WebContents are audible when a WebContents become audible.
// - how long multiple WebContents are audible at the same time.
// - for a browsing session, how often and how many WebContents get audible at
//   the same time.
// - if an audible tab was closed and we only have one audible tab open anymore
//   then we should record whether we closed the newest or oldest tab.
class CONTENT_EXPORT AudibleMetrics { … };

}  // namespace content

#endif // CONTENT_BROWSER_MEDIA_AUDIBLE_METRICS_H_