Drop TrackDisplayUpdateScope in HTMLMediaElement::removeTextTrack

This will end up calling TextTrack::setTrackList (if needed) which
calls CueTimeline::removeCues - which is already doing a "batched"
update.

BUG=321654

Review URL: https://codereview.chromium.org/990183002

git-svn-id: svn://svn.chromium.org/blink/trunk@191555 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed
tree: 254bebda31154bec0c7f50c76fc975f12c0ae413
  1. third_party/