content/child: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/renderer/media/media_stream_video_source.cc

Index: content/renderer/media/media_stream_video_source.cc
diff --git a/content/renderer/media/media_stream_video_source.cc b/content/renderer/media/media_stream_video_source.cc
index c4b0c2265b7332b7712ae498b3c027f55703730f..f0555ad94b9b33821fed305ae3951de3ba055955 100644
--- a/content/renderer/media/media_stream_video_source.cc
+++ b/content/renderer/media/media_stream_video_source.cc
@@ -351,8 +351,8 @@ bool MediaStreamVideoSource::IsConstraintSupported(const std::string& name) {
 
 MediaStreamVideoSource::MediaStreamVideoSource()
     : state_(NEW),
-      track_adapter_(new VideoTrackAdapter(
-          ChildProcess::current()->io_message_loop_proxy())),
+      track_adapter_(
+          new VideoTrackAdapter(ChildProcess::current()->io_task_runner())),
       weak_factory_(this) {
 }
 
@@ -441,10 +441,9 @@ void MediaStreamVideoSource::RemoveTrack(MediaStreamVideoTrack* video_track) {
     StopSource();
 }
 
-const scoped_refptr<base::MessageLoopProxy>&
-MediaStreamVideoSource::io_message_loop() const {
+base::SingleThreadTaskRunner* MediaStreamVideoSource::io_task_runner() const {
   DCHECK(CalledOnValidThread());
-  return track_adapter_->io_message_loop();
+  return track_adapter_->io_task_runner();
 }
 
 void MediaStreamVideoSource::DoStopSource() {