Mark 'fast/events/middleClickAutoscroll-drag.html' to be flaky as well.

TBR=wjmaclean@chromium.org

Bug: 891155
Change-Id: I27212eee19d0f7f67b4ee5caba3df4562edb30d2
Reviewed-on: https://chromium-review.googlesource.com/c/1281225
Reviewed-by: Chan Li <chanli@chromium.org>
Commit-Queue: Chan Li <chanli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#599787}
1 file changed