Revert "Revert "Oilpan: fix for r173953.""

This reverts r173991. It was not the cause of the test failures.

BUG=372973
TBR=zerny@chromium.org

Review URL: https://codereview.chromium.org/270593008

git-svn-id: svn://svn.chromium.org/blink/trunk@173992 bbb929c8-8fbe-4397-9dbb-9b2b20218538