Remove implicit conversions from scoped_refptr to T* in content/renderer/media/

content/renderer/media/media_stream_track.cc

Index: content/renderer/media/media_stream_track.cc
diff --git a/content/renderer/media/media_stream_track.cc b/content/renderer/media/media_stream_track.cc
index 9aca963af4f47bd57b38834975700a256ce964fd..f3b728db88d09b6291468c157821453d4c24f665 100644
--- a/content/renderer/media/media_stream_track.cc
+++ b/content/renderer/media/media_stream_track.cc
@@ -29,7 +29,7 @@ MediaStreamTrack::~MediaStreamTrack() {
 
 void MediaStreamTrack::SetEnabled(bool enabled) {
   DCHECK(thread_checker_.CalledOnValidThread());
-  if (track_)
+  if (track_.get())
     track_->set_enabled(enabled);
 }
 
@@ -49,7 +49,7 @@ void MediaStreamTrack::Stop() {
   // 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.
-  if (track_)
+  if (track_.get())
     track_->set_enabled(false);
 }