Google learned it can be "standards compliant" if it submits a draft spec to WHATWG/W3C, and while the comment and revision process is still ongoing, roll out those features in Chrome and start using them in YouTube, Gmail, Google docs, and AMP. Now Firefox and Safari are forced to implement those draft specs as well or users will leave in droves because Google websites are broken. Soon enough, Google's draft spec is standardized with minimal revisions because it's already out there in the wild.
The debate, revision, and multistakeholder aspects of the standards process have been effectively bypassed, a la IE6 and ActiveX, but Chrome can claim to be on the cutting edge of standards compliance. This is a case of Goodharts's law.