Revert "[LayoutNG] Calculate flex container intrinsic sizes"

This reverts commit ca41baba579f7e0ec716cc09470ee222b1bd2f21.

Reason for revert: This causes multiple layout test failures on some bots: crbug.com/920039

Original change's description:
> [LayoutNG] Calculate flex container intrinsic sizes
> 
> This is based off the old algorithm that legacy implements. The new
> algorithm makes more sense but will have compat problems.
> 
> Bug: 845235
> Change-Id: Ib4c115e9ad955ce6ab8a5fbcdd2d993feeebfd4f
> Reviewed-on: https://chromium-review.googlesource.com/c/1389315
> Commit-Queue: David Grogan <dgrogan@chromium.org>
> Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#620849}

TBR=cbiesinger@chromium.org,dgrogan@chromium.org,mstensho@chromium.org

Change-Id: I14cdf536035404693d11d656c09f19124d299fe2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 845235
Reviewed-on: https://chromium-review.googlesource.com/c/1401861
Reviewed-by: Hajime Hoshi <hajimehoshi@chromium.org>
Commit-Queue: Hajime Hoshi <hajimehoshi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#620970}
4 files changed