Previously we didn't account for intrinsic-padding when determining the
static postiion in the simplified layout algorithm.

When using vertical-align: middle (or something which triggers intrinsic
padding) a OOF-position node might "jump".

This was found with the lastpass password manager.

Bug: 1000864
Change-Id: I94831f735a7e0992130ae065b0f6c9c6abb8c37a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1785898


Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Reviewed-by: Aleks Totic <atotic@chromium.org>
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#693446}