WPT import https://crrev.com/c/1351265 introduced new failures in external/wpt/css/css-multicol:

List of new failures:
virtual/layout_ng_experimental/external/wpt/css/css-multicol/multicol-span-all-004.html [ Failure ]

This import contains upstream changes from 04d65b39f4f66d238f0329740ef658fafb446cf5 to fab7e0bf59e7085f7bbf38f97548143cecdc3434:
Do not span column-span:all element across all columns if it's under different block formatting context.: https://github.com/web-platform-tests/wpt/commit/fab7e0bf59e7085f7bbf38f97548143cecdc3434 [affecting this directory]