chromium/content/browser/renderer_host/media/media_stream_track_metrics_host.h

// Copyright 2014 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_RENDERER_HOST_MEDIA_MEDIA_STREAM_TRACK_METRICS_HOST_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_TRACK_METRICS_HOST_H_

#include <stdint.h>

#include <map>

#include "base/time/time.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/receiver_set.h"
#include "third_party/blink/public/mojom/mediastream/media_stream.mojom.h"

namespace content {

// Responsible for logging metrics about audio and video track
// lifetimes. These are based on messages from the renderer that are
// sent when tracks are created and destroyed. Unfortunately we can't
// reliably log the lifetime metric in the renderer because that
// process may be destroyed at any time by the fast shutdown path (see
// RenderProcessHost::FastShutdownIfPossible).
//
// There is one instance of this class per render process.
//
// If the renderer process goes away without sending messages that
// tracks were removed, this class instead infers that the tracks were
// removed.
class MediaStreamTrackMetricsHost
    : public blink::mojom::MediaStreamTrackMetricsHost { … };

}  // namespace content

#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_TRACK_METRICS_HOST_H_