We could end up in a state where we retrieved a cached *measure*
result, and a cache status of kNeedsSimplifiedLayout. However, if the
box had previously fragmented, it wouldn't have a cached layout result
(and its children might not either). We should avoid simplified
layout in this case since simplified layout relies on children having
a cached layout result.

Bug: 1321393
Change-Id: I9748c75cebbdefc7946e27c40bc8f6024cf305af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3621501


Commit-Queue: Alison Maher <almaher@microsoft.com>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1000431}