Gardening stuff.

Mark http/tests/w3c/webperf/submission/Google/resource-timing/html/test_resource_initiator_types.html as fail on Mac.

BUG=418091
TEST=
TBR=wangxianzhu@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/621513002

git-svn-id: svn://svn.chromium.org/blink/trunk@182975 bbb929c8-8fbe-4397-9dbb-9b2b20218538