Gardening: fast/workers/worker-multi-startup.html is crashing on Linux

Appears to be from a v8 roll.

TBR=dcarney@chromium.org
BUG=362146

Review URL: https://codereview.chromium.org/226653003

git-svn-id: svn://svn.chromium.org/blink/trunk@171291 bbb929c8-8fbe-4397-9dbb-9b2b20218538