Gardening: Tests are passing on Retina again

It seems the revert r178142 healed the tests.

BUG=393706
TBR=junov

Review URL: https://codereview.chromium.org/394753002

git-svn-id: svn://svn.chromium.org/blink/trunk@178155 bbb929c8-8fbe-4397-9dbb-9b2b20218538