[LayoutNG] OOFLayout need to pass container writing mode to abspos utils

They are needed to resolve overconstrained constraints per spec.

Bug: 740993
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_layout_ng
Change-Id: I6766fe17603148212b22d2c1f6f23fc9e9b46bb6
Reviewed-on: https://chromium-review.googlesource.com/762177
Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Commit-Queue: Aleks Totic <atotic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516211}
5 files changed