Gardening: Mark worker-reload-repeated.html crashy.

TBR=kinuko@chromium.org, tyoshino@chromium.org
BUG=349537

Review URL: https://codereview.chromium.org/186723006

git-svn-id: svn://svn.chromium.org/blink/trunk@168515 bbb929c8-8fbe-4397-9dbb-9b2b20218538