Bug 1564572 [wpt PR 17733] - [LayoutNG] Ensure self-collapsing block …

…relayout when ancestor resolves., a=testonly

Automatic update from web-platform-tests
[LayoutNG] Ensure self-collapsing block relayout when ancestor resolves.

This bug was a combination of older code before we had "forced" BFC
block-offsets.

We didn't correctly detect when we had a self-collapsing block (which
had floats within it) that needed relayout if the initial estimate
was wrong.

This makes sure we give ourselves enough information to detect these
cases.

Bug: 980803
Change-Id: Id1ea5e10d819cb4509fd7664564b75b876f0f7cb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1690720
Commit-Queue: Ian Kilpatrick <ikilpatrickchromium.org>
Commit-Queue: Emil A Eklund <eaechromium.org>
Reviewed-by: Emil A Eklund <eaechromium.org>
Cr-Commit-Position: refs/heads/master{#675729}

--

wpt-commits: 137960cfe6ce5b4dfb7a6d0bad126d517e03e009
wpt-pr: 17733

UltraBlame original commit: a77ec3f112e35fc557439dc56d526bde3b8dee0a

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