tree 17067516a5473b51fe64f6099ce8b9be35245761
parent 357197316b6a94f94409a7947f036c288c07405a
author Alison Maher <almaher@microsoft.com> 1621564012 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1621565679 -0700

[LayoutNG] Writeback to legacy layout with no column set after spanner

In the case of external/wpt/css/css-multicol/multicol-span-all-016.html,
one column set is created before the spanner, but no column set is
created after the spanner. In NG, columns with content may be created
after the spanner, resulting in incorrect bounds when querying
legacy layout. To fix this, extend the last column set when building up
the flow thread in NGBlockNode::PlaceChildrenInFlowThread() to
encompass any content after the spanner.

Bug: 1210287
Change-Id: I7604de3645fb8874d4faf193614b5742dc64e17e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2898491
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Commit-Queue: Alison Maher <almaher@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#885350}