BUG=swiftshader:15

Change-Id: I3c3314f3787d42835a9483c7b797dc1dbdc0b76a
Reviewed-on: https://chromium-review.googlesource.com/400663Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Jim Stichnoth <stichnot@chromium.org>