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This reverts commit 5f44611e.

Reason for revert: Potential cause of recent crashes in toolbar layouts.

Original change's description:
> Use class properties for Ignored and can-be-visible state in a layout for a given view.
>
> This will remove the need for the child_infos_ field in LayoutManagerBase.
>
> Somewhat related to the work of integrating fill layout behavior into views::View.
>
> Bug: 1159116
> Change-Id: I968aa58fb3b29f78d96cd520e61ccb731c2e9ac9
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2605567
> Commit-Queue: Peter Kasting <pkasting@chromium.org>
> Reviewed-by: Peter Kasting <pkasting@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#839620}

TBR=pkasting@chromium.org,kylixrd@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1159116
Change-Id: I9672a447b3b30530c049a9f6a89a8a1d42621bf6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2611911Reviewed-by: Allen Bauer <kylixrd@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840368}