Re-enable ContextMenuTestCase flaky tests.

These tests have passed the last ten runs.

Bug: 817810
Change-Id: I1aaee05a28878065a0ea1a4ccceaed17ec6340cd
Reviewed-on: https://chromium-review.googlesource.com/c/1407591
Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622151}
1 file changed