[css] Revert relpos and sticky table elements

This reverts the logic, but not tests, from:

7f7beb7dc8691f39a273aaa3f0915fabe3ceee50
ca3ed70409f9945d3f215fb296fd3628e1989a7c
842ea8f45240e700e448ae9bcd4ca65dc9596079

The bottom caused netflix to render wrong, the top 2 were built on the
bottom.

Bug: 417223,702927,798164
Change-Id: Icb350aa0ea385937294040ce681345e3314da0e2
Reviewed-on: https://chromium-review.googlesource.com/875015
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Commit-Queue: David Grogan <dgrogan@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#530620}(cherry picked from commit 26531bbaff4aac1b026b4f908085d5d5014d9ec0)
Reviewed-on: https://chromium-review.googlesource.com/879381
Reviewed-by: David Grogan <dgrogan@chromium.org>
Cr-Commit-Position: refs/branch-heads/3325@{#20}
Cr-Branched-From: bc084a8b5afa3744a74927344e304c02ae54189f-refs/heads/master@{#530369}
4 files changed