Test each field for smaller or larger than, and when they're equal test the
next field.

BUG=angle:605

Change-Id: I2c5a90d95c7ff73b83f3067381c14b74a213ef05
Reviewed-on: https://chromium-review.googlesource.com/194602Tested-by: Nicolas Capens <nicolascapens@chromium.org>
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>