Update TextTrack creation
Created by: nicosang
Hi,
this PR has to solve issue #2564 (closed) by removing specific implementation of textTrack creation in Chrome browser. Before this PR, textTrack was created by calling document.createElement ('track'). By doing like this, cues added after parsing VTT subtitles was deleted by latest Chrome 66 version.
any feedback will be appreciate....
thanks,
Nico