Revert of fix getComputedStyle positioned element values (patchset #4 id:60001 of https://codereview.chromium.org/1826423003/ )

Reason for revert:
Caused crbug.com/602934.

BUG=602934,589347

Original issue's description:
> getComputedStyle now returns used values for top, left, bottom, right
>
> getComputedStyle now returns used values for the top, left, bottom, and
> right properties of positioned elements, instead of returning computed
> values, if the display property is not None.
>
> R=mstensho@opera.com
> BUG=589347
>
> Committed: https://crrev.com/6a2ed97b65b691947eeffbf44ff48a8af2ddff3a
> Cr-Commit-Position: refs/heads/master@{#385493}

TBR=mstensho@opera.com,rune@opera.com,timloh@chromium.org,khart@codeaurora.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=589347

Review URL: https://codereview.chromium.org/1888533002

Cr-Commit-Position: refs/heads/master@{#387068}
12 files changed