[Chromium sheriff] Add Timeout to TestExpectations for media/track/track-kind.html

TBR=shend@chromium.org

Bug: 782095
Change-Id: Ib0e8b999af3a3a40715113c2565de515d20b4981
Reviewed-on: https://chromium-review.googlesource.com/756139
Reviewed-by: meade_UTC10 <meade@chromium.org>
Reviewed-by: Darren Shen <shend@chromium.org>
Commit-Queue: meade_UTC10 <meade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#514387}
1 file changed