Our JS WebVTT implementation (vtt.js) needs access to the Track's
TextTrackList in order to compute the line position of a TextTrackCue.
Therefore, we need to expose it to chrome JS so that vtt.js can have
access to it.
- Updated RemoveCue to throw NotFoundError if the cue being removed is
not in the cue list.
- Updated AddCue to not add cues that are already in the list. This is
done by reference comparing.
This way we can ensure that JS code written for WebVTT is spec
compliant while at the same time not having to abstract VTTCue
from TextTrackCue.
--HG--
rename : dom/webidl/TextTrackCue.webidl => dom/webidl/VTTCue.webidl
Add webidl interfaces and implementations of the HTML <track>
element and related TextTrack, TextTrackList, TextTrackCue,
and TextTrackCueList dom objects.
Visibility is controlled by the media.webvtt.enabled pref,
which defaults to false.
HTMLMediaElement:NewURIFromString() is hoisted to
nsGenericHTMLElement so it's available to the track
element as well.
This patch is primarily work by Dale Karp, David Humphrey
and others as Seneca College.
