HTMLMediaElement used to double-guard text track code with both an ENABLE(VIDEO_TRACK) and a RuntimeEnabledFeatures::webkitVideoTrackEnabled() check. But various more-recent CLs (99984, 100064, 102968, 107831, 108241) appear to only use the ENABLE check, effectively turning on a bunch of text track code (visible e.g. with --webcore-log-channels=Media in chromium).
Created attachment 135111 [details] Patch
Comment on attachment 135111 [details] Patch Clearing flags on attachment: 135111 Committed r112900: <http://trac.webkit.org/changeset/112900>
All reviewed patches have been landed. Closing bug.