Some wpt multicol tests were marked as flaky with https://chromium-review.googlesource.com/c/chromium/src/+/817748
Only happened on Win7 Tests (dbg)(1) [1], as far as I know, and no layout test results are saved with that bot. So pretty hard to know what's going on. Could have to do with the Ahem font [2], but then again, there are many wpt tests that use Ahem.
List of flaky tests:
external/wpt/css/css-multicol/multicol-fill-balance-001.xht
external/wpt/css/css-multicol/multicol-gap-negative-001.xht
external/wpt/css/css-multicol/multicol-overflow-000.xht
external/wpt/css/css-multicol/multicol-overflowing-001.xht
external/wpt/css/css-multicol/multicol-rule-002.xht
external/wpt/css/css-multicol/multicol-rule-shorthand-2.xht
external/wpt/css/css-multicol/multicol-rule-stacking-001.xht
external/wpt/css/css-multicol/multicol-width-001.xht
[1] https://uberchromegw.corp.google.com/i/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29 (Googlers only)
[2] See third_party/WebKit/LayoutTests/resources/ahem.js , which is used many non-wpt tests to make Ahem work better on Windows.
Comment 1 by bugdroid1@chromium.org
, Dec 12 2017