Commits on Feb 26, 2021

1. Avoid fragmentainer overflow from children of monolithic content. …

   Checking if the border box of a monolithic element can fit in the
   current fragmentainer isn't enough. Children may overflow its border
   box, and it's this size that we need to consider when determining
   whether a monolithic element can fit in the current fragmentainer, or if
   we have to push it to the next one.
   
   Had to add a work-around to
   fast/multicol/vertical-lr/balancing/balance-unbreakable.html to prevent
   the (monolithic) IMG element (with alt text) in the test from messing
   up. The broken image symbol got incorrectly aligned and therefore
   incorrectly contributed to overflow. Reported crbug.com/1178743 for
   this. Use a real image as a work-around. My first attempt was to switch
   the IMG to writing-mode:horizontal-tb, but that messes up legacy column
   balancing. Oh well...
   
   Bug: 1178742
   Change-Id: Iffbe55d53f32003ae58b574bb6a38745bb92d42e
   Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2696632
   Commit-Queue: Morten Stenshorne <mstensho@chromium.org>
   Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
   Cr-Commit-Position: refs/heads/master@{#858109}

   

   mstensho authored and chromium-wpt-export-bot committed Feb 26, 2021
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