diff -r 000000000000 -r 6474c204b198 content/media/MediaStreamTrack.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/MediaStreamTrack.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MEDIASTREAMTRACK_H_
+#define MEDIASTREAMTRACK_H_
+
+#include "mozilla/DOMEventTargetHelper.h"
+#include "nsID.h"
+#include "StreamBuffer.h"
+
+namespace mozilla {
+
+class DOMMediaStream;
+
+namespace dom {
+
+class AudioStreamTrack;
+class VideoStreamTrack;
+
+/**
+ * Class representing a track in a DOMMediaStream.
+ */
+class MediaStreamTrack : public DOMEventTargetHelper {
+public:
+  /**
+   * aTrackID is the MediaStreamGraph track ID for the track in the
+   * MediaStream owned by aStream.
+   */
+  MediaStreamTrack(DOMMediaStream* aStream, TrackID aTrackID);
+  virtual ~MediaStreamTrack();
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaStreamTrack,
+                                           DOMEventTargetHelper)
+
+  DOMMediaStream* GetParentObject() const { return mStream; }
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE = 0;
+
+  DOMMediaStream* GetStream() const { return mStream; }
+  TrackID GetTrackID() const { return mTrackID; }
+  virtual AudioStreamTrack* AsAudioStreamTrack() { return nullptr; }
+  virtual VideoStreamTrack* AsVideoStreamTrack() { return nullptr; }
+
+  // WebIDL
+  virtual void GetKind(nsAString& aKind) = 0;
+  void GetId(nsAString& aID);
+  void GetLabel(nsAString& aLabel) { aLabel.Truncate(); }
+  bool Enabled() { return mEnabled; }
+  void SetEnabled(bool aEnabled);
+
+  // Notifications from the MediaStreamGraph
+  void NotifyEnded() { mEnded = true; }
+
+protected:
+  nsRefPtr<DOMMediaStream> mStream;
+  TrackID mTrackID;
+  nsID mID;
+  bool mEnded;
+  bool mEnabled;
+};
+
+}
+}
+
+#endif /* MEDIASTREAMTRACK_H_ */