Note that the Chromium bug is fixed-in-LayoutNG, and I believe it's even the float behavior-change that's described at https://www.chromium.org/blink/layoutng
Bug 1499458 Comment 8 Edit History
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Note that the Chromium bug is fixed-in-LayoutNG (which will supposedly be shipping in Chrome 76), and I believe it's even the float behavior-change that's described at https://www.chromium.org/blink/layoutng