Cast: Remove LoggingStats in favor of event subscribers.

media/cast/logging/stats_event_subscriber.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_CAST_LOGGING_STATS_EVENT_SUBSCRIBER_H_
+#define MEDIA_CAST_LOGGING_STATS_EVENT_SUBSCRIBER_H_
+
+#include "base/threading/thread_checker.h"
+#include "media/cast/logging/logging_defines.h"
+#include "media/cast/logging/raw_event_subscriber.h"
+
+namespace media {
+namespace cast {
+
+// A RawEventSubscriber implementation that subscribes to events,
+// and aggregates them into stats.
+class StatsEventSubscriber : public RawEventSubscriber {
+ public:
+  StatsEventSubscriber(EventMediaType media_type);
+
+  virtual ~StatsEventSubscriber();
+
+  // RawReventSubscriber implementations.
+  virtual void OnReceiveFrameEvent(const FrameEvent& frame_event) OVERRIDE;
+  virtual void OnReceivePacketEvent(const PacketEvent& packet_event) OVERRIDE;
+  virtual void OnReceiveGenericEvent(const GenericEvent& generic_event)
+      OVERRIDE;
+
+  // Assigns |frame_stats_map| with frame stats.
+  void GetFrameStats(FrameStatsMap* frame_stats_map) const;
+
+  // Assigns |packet_stats_map| with packet stats.
+  void GetPacketStats(PacketStatsMap* packet_stats_map) const;
+
+  // Assigns |generic_stats_map| with generic stats data.
+  void GetGenericStats(GenericStatsMap* generic_stats_map) const;
+
+  // Resets all stats maps in this object.
+  void Reset();
+
+ private:
+  EventMediaType event_media_type_;
+  FrameStatsMap frame_stats_;
+  PacketStatsMap packet_stats_;
+  GenericStatsMap generic_stats_;
+  base::ThreadChecker thread_checker_;
+  DISALLOW_COPY_AND_ASSIGN(StatsEventSubscriber);
+};
+
+}  // namespace cast
+}  // namespace media
+
+#endif  // MEDIA_CAST_LOGGING_STATS_EVENT_SUBSCRIBER_H_