Widen failure expectation for interrupted-all-transition test

Unreviewed gardening. Looks flaky on all platforms/build types.

BUG=248938
NOTRY=true
TBR=pfeldman@chromium.org

Review URL: https://codereview.chromium.org/35763003

git-svn-id: svn://svn.chromium.org/blink/trunk@160239 bbb929c8-8fbe-4397-9dbb-9b2b20218538