Bug 1588351 [wpt PR 19658] - [LayoutNG] Use legacy borders when paint…

…ing table cell fragments, a=testonly

Automatic update from web-platform-tests
[LayoutNG] Use legacy borders when painting table cell fragments

NG fragments don't support collapsed borders yet. This manifested with
background-clip. When the position/size of the clipped background was
determined, the cells' full borders were used, not half of the winning
border as is correct in collapsed mode.

Bug: 1008400
Change-Id: I53a80c88d854136e8d3f540fe7b8c969152aad13
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1858519
Commit-Queue: David Grogan <dgroganchromium.org>
Reviewed-by: Morten Stenshorne <mstenshochromium.org>
Cr-Commit-Position: refs/heads/master{#705454}

--

wpt-commits: 8ecb8a727ddcfc2f5d0c2a996186a19654cae6f6
wpt-pr: 19658

UltraBlame original commit: d772303dfa9dfd0ad21106f8f6691c48a7aab798

testing/web-platform/tests/css/css-tables/background-clip-001.html

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