Revert of [css-grid] Fix definite/indefinite size detection for abspos elements (patchset #2 id:20001 of https://codereview.chromium.org/1383003002/ )

Reason for revert:
This is breaking how percentages work in
Flexbox and Grid compared to regular Blocks.

There're some discussion ongoing on the CSS WG to verify
the expected behavior, so we're reverting this for now
until we've a final resolution.

Original issue's description:
> [css-grid] Fix definite/indefinite size detection for abspos elements
>
> We were considering that any abspos element has a definite size, and
> that's not true. That's only true if the offset properties in that
> dimension (left and right or top and bottom) are non-auto.
> Fixed LayoutBox::hasDefiniteLogicalWidth|Height() to check this
> properly.
>
> This has been confirmed by the CSS WG in the following thread:
> https://lists.w3.org/Archives/Public/www-style/2015Nov/0074.html
>
> BUG=538513
> TEST=fast/css-grid-layout/positioned-grid-container-percentage-tracks.html
>
> Committed: https://crrev.com/b75b9bdaa3ede6fe0230ae822885d6fb38ed514b
> Cr-Commit-Position: refs/heads/master@{#386045}

TBR=cbiesinger@chromium.org,svillar@igalia.com,mstensho@opera.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=538513,603854,604346,608783

Review-Url: https://codereview.chromium.org/1954683002
Cr-Commit-Position: refs/heads/master@{#391789}
2 files changed