gardening: unflake inspector/console/console-format-broken-unicode.html

BUG=390506
TBR=aandrey

Review URL: https://codereview.chromium.org/347153003

git-svn-id: svn://svn.chromium.org/blink/trunk@177317 bbb929c8-8fbe-4397-9dbb-9b2b20218538