Bug 166661

Summary:	It should not be possible to set track language for in-band media
Product:	WebKit	Reporter:	John Wilander <wilander>
Component:	Media	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	eric.carlson, jer.noble, wilander
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=123926

Description John Wilander 2017-01-03 13:51:12 PST

TrackBase::setLanguage() currently allows any track element to set language. The setter should first check that the track is not in-band, for instance through a convenience function in HTMLMediaElement.

This change should get rid of the ENABLE(MEDIA_SOURCE) in JSTextTrack::setLanguage() (see JSTextTrackCustom.cpp). Possibly even get rid of the custom setter all together, see [CustomSetter] attribute DOMString language in TextTrack.idl.

This change will correct the expected test results from https://bugs.webkit.org/show_bug.cgi?id=123926.