Setting aside the merits/lack-thereof of this particular decision, Chromium ignoring established web standards like this is especially dangerous as we're trending towards a world where 1) Chromium itself powers the most popular browser in the world by an increasingly unhealthy margin, and 2) even competing browsers are increasingly becoming skins on top of Chromium. We are becoming more and more reliant on the develo…
Strictly speaking, Chrome is not ignoring a web standard, since the standard does not require this behavior (no "MUST" keyword).
Nevertheless, from their stance on the issue so far it stands to reason that the Chromium team would have objected to any efforts to tighten the spec, which would also have led us to this same situation.