Gardening: update expectations for http/tests/workers/terminate-during-sync-operation.html

TBR=esprehn
BUG=357427

Review URL: https://codereview.chromium.org/298063008

git-svn-id: svn://svn.chromium.org/blink/trunk@174868 bbb929c8-8fbe-4397-9dbb-9b2b20218538