Unmark http/tests/workers/terminate-during-sync-operation.html as flaky.
Unmark http/tests/workers/terminate-during-sync-operation.html as flaky.

BUG=339539
TBR=dglazkov@chromium.org

Review URL: https://codereview.chromium.org/134193013

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@166389 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs