media: Plumb MediaLog to MojoVideoDecoderService.

media/mojo/common/mojo_media_log_service.h

+// Copyright 2017 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_MOJO_SERVICES_MOJO_MEDIA_LOG_SERVICE_H_
+#define MEDIA_MOJO_SERVICES_MOJO_MEDIA_LOG_SERVICE_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "media/base/media_log.h"
+#include "media/mojo/interfaces/media_log.mojom.h"
+
+namespace media {
+
+// Implementation of a mojom::MediaLog service which wraps a media::MediaLog.
+class MojoMediaLogService : public mojom::MediaLog {
+ public:
+  explicit MojoMediaLogService(media::MediaLog* media_log);
+  ~MojoMediaLogService() final;
+
+  // mojom::MediaLog implementation
+  void AddEvent(const media::MediaLogEvent& event) final;
+
+ private:
+  media::MediaLog* media_log_;
+  int32_t id_;
+
+  DISALLOW_COPY_AND_ASSIGN(MojoMediaLogService);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_MOJO_SERVICES_MOJO_MEDIA_LOG_SERVICE_H_