Chrome MediaStream VideoTrack implementation.

content/renderer/media/media_stream_center.cc

Index: content/renderer/media/media_stream_center.cc
diff --git a/content/renderer/media/media_stream_center.cc b/content/renderer/media/media_stream_center.cc
index c97851b71af934a1da757d46381c7b5d75036fe1..770498a6b43f58072d03a8629bd872148326c515 100644
--- a/content/renderer/media/media_stream_center.cc
+++ b/content/renderer/media/media_stream_center.cc
@@ -14,7 +14,9 @@
 #include "content/renderer/media/media_stream.h"
 #include "content/renderer/media/media_stream_dependency_factory.h"
 #include "content/renderer/media/media_stream_source.h"
+#include "content/renderer/media/media_stream_video_source.h"
 #include "content/renderer/media/media_stream_video_track.h"
+#include "third_party/WebKit/public/platform/WebMediaConstraints.h"
 #include "third_party/WebKit/public/platform/WebMediaStream.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamCenterClient.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
@@ -46,17 +48,19 @@ void CreateNativeVideoMediaStreamTrack(
   DCHECK(track.extraData() == NULL);
   blink::WebMediaStreamSource source = track.source();
   DCHECK_EQ(source.type(), blink::WebMediaStreamSource::TypeVideo);
-
-  if (!source.extraData()) {
+  MediaStreamVideoSource* native_source =
+      MediaStreamVideoSource::GetVideoSource(source);
+  if (!native_source) {
     // TODO(perkj): Implement support for sources from
     // remote MediaStreams.
     NOTIMPLEMENTED();
     return;
   }
-  MediaStreamTrack* native_track = new MediaStreamVideoTrack(factory);
-  native_track->SetEnabled(track.isEnabled());
   blink::WebMediaStreamTrack writable_track(track);
-  writable_track.setExtraData(native_track);
+  writable_track.setExtraData(
+      new MediaStreamVideoTrack(native_source, source.constraints(),
+                                MediaStreamVideoSource::ConstraintsCallback(),
+                                track.isEnabled(), factory));
 }
 
 void CreateNativeMediaStreamTrack(const blink::WebMediaStreamTrack& track,