[webkit-reviews] review requested: [Bug 83377] Setting mode for track element results in ASSERT : [Attachment 136740] patch with faster test

[bugzilla-daemon at webkit.org]

Anna Cavender <annacc at chromium.org> has asked  for review:
Bug 83377: Setting mode for track element results in ASSERT
https://bugs.webkit.org/show_bug.cgi?id=83377

Attachment 136740: patch with faster test
https://bugs.webkit.org/attachment.cgi?id=136740&action=review