[Gardening] Layout Test http/tests/serviceworker/cache-match.html is failing

BUG=431163
TBR=dcheng@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/708923002

git-svn-id: svn://svn.chromium.org/blink/trunk@184943 bbb929c8-8fbe-4397-9dbb-9b2b20218538