[Bug 14105] Drop MutableTextTrack and make TextTrack always mutable

http://www.w3.org/Bugs/Public/show_bug.cgi?id=14105

--- Comment #6 from Ian 'Hixie' Hickson <ian@hixie.ch> 2011-09-19 22:44:39 UTC ---
Mutable data structures are significantly more expensive and complicated.

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Received on Monday, 19 September 2011 22:44:45 UTC