Gardenind: mark http/tests/perf/large-inlined-script.html as flaky

BUG=24182
TBR= jianli@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/562123003

git-svn-id: svn://svn.chromium.org/blink/trunk@181813 bbb929c8-8fbe-4397-9dbb-9b2b20218538