[LayoutNG] NGPhysicalFragment::CheckType() for columns.

Follow-up to CL:1669916

Change-Id: Ie98e1cbf0ed3cb90b41bdc682367474992bd1970
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1676124
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672124}
1 file changed