Bug 1734913 [wpt PR 31167] - [css-flex] Make flex item height indefinite with flex...

Bug 1734913 [wpt PR 31167] - [css-flex] Make flex item height indefinite with flex-basis:content, a=testonly

Automatic update from web-platform-tests
[css-flex] Make flex item height indefinite with flex-basis:content

A definite specified height can't be the only reason an item height is
definite. Instead, we have to look at used flex basis, which isn't
always the same as specified height.

Fixed: 1255340
Change-Id: I83ea37da07115a0d403a8d29ccc1530f34f47f9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3214497
Commit-Queue: David Grogan <dgrogan@chromium.org>
Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Regan Hsu <hsuregan@chromium.org>
Cr-Commit-Position: refs/heads/main@{#931333}

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wpt-commits: dad94a0e4a2e44557fa73849ead7979f88208450
wpt-pr: 31167