Update MediaStreamTrack::Stop to latest draft.

content/renderer/media/media_stream.cc

Index: content/renderer/media/media_stream.cc
diff --git a/content/renderer/media/media_stream.cc b/content/renderer/media/media_stream.cc
index 9a8f143211541224ea404d6163506dbf168a2103..bb8a9530814a1eb6e18ba2f52ed68f50f39a426e 100644
--- a/content/renderer/media/media_stream.cc
+++ b/content/renderer/media/media_stream.cc
@@ -26,10 +26,8 @@ webrtc::MediaStreamInterface* MediaStream::GetAdapter(
 }
 
 MediaStream::MediaStream(MediaStreamDependencyFactory* factory,
-                         StreamStopCallback stream_stop,
                          const blink::WebMediaStream& stream)
-    : stream_stop_callback_(stream_stop),
-      stream_adapter_(NULL),
+    : stream_adapter_(NULL),
       is_local_(true),
       label_(stream.id().utf8()),
       factory_(factory) {
@@ -46,11 +44,6 @@ MediaStream::MediaStream(webrtc::MediaStreamInterface* stream)
 MediaStream::~MediaStream() {
 }
 
-void MediaStream::OnStreamStopped() {
-  if (!stream_stop_callback_.is_null())
-    stream_stop_callback_.Run(label_);
-}
-
 webrtc::MediaStreamInterface* MediaStream::GetWebRtcAdapter(
     const blink::WebMediaStream& stream) {
   if (!stream_adapter_) {