Add generic interfaces for the sinks of the media stream audio track

content/renderer/media/media_stream_track_extra_data.cc

 // Copyright 2013 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.
 
 #include "content/renderer/media/media_stream_track_extra_data.h"
 
 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
 
 namespace content {
 
 MediaStreamTrackExtraData::MediaStreamTrackExtraData(
-    webrtc::MediaStreamTrackInterface* track)
-    : track_(track) {
+    webrtc::MediaStreamTrackInterface* track, bool is_local_track)
+    : track_(track),
+      is_local_track_(is_local_track) {
 }
 
 MediaStreamTrackExtraData::~MediaStreamTrackExtraData() {
 }
 
 }  // namespace content