[transitions] Update CSSTransition-startTime.tentative test expectation

The CSSTransition-startTime.tentative.html test has been updates upstream
to fail consistently with new timeouts.

Since Blink does not implement 'transition{start,end}' events (http://crbug.com/439056)
the event tests are expected to fail. The expectation file reflects this
so the test should no longer timeout or be flaky.

Local test (20 runs) suggests it is consistent now. Updating expectation
file to reflect this.

R: smcgruer@chromium.org
Bug: 875622, 922970
Change-Id: Ica3999434e7126934b70dfc5bd755f8c45904d62
Reviewed-on: https://chromium-review.googlesource.com/c/1416879
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Commit-Queue: Majid Valipour <majidvp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623785}
1 file changed