Move RemoteMediaStreamAudioTrack to Separete Files

content/renderer/media/remote_media_stream_audio_track.cc

+// Copyright (c) 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/remote_media_stream_audio_track.h"
+
+#include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
+
+namespace content {
+
+RemoteMediaStreamAudioTrack::RemoteMediaStreamAudioTrack(
+    const scoped_refptr<webrtc::AudioTrackInterface>& track,
+    const scoped_refptr<base::SingleThreadTaskRunner>& signaling_thread)
+    : MediaStreamTrack(false),
+      track_(track),
+      signaling_thread_(signaling_thread) {
+}
+
+RemoteMediaStreamAudioTrack::~RemoteMediaStreamAudioTrack() {
+}
+
+void RemoteMediaStreamAudioTrack::SetEnabled(bool enabled) {
+  track_->set_enabled(enabled);
+}
+
+void RemoteMediaStreamAudioTrack::Stop() {
+  // Stop means that a track should be stopped permanently. But
+  // since there is no proper way of doing that on a remote track, we can
+  // at least disable the track. Blink will not call down to the content layer
+  // after a track has been stopped.
+  SetEnabled(false);
+}
+
+}  // namespace content