This is a very clever hack. I've tried in the past to adjust my HTML to disable autofill and it's not possible to prevent Chrome from aggressively doing it.
It's disabled if you do autocomplete=off in the attributes
Not in my tests, it continued to aggressively populate forms with autocomplete="off" set.
That would be because that attribute is for a different feature of the browser. The autofill that this method takes advantage of is more of an extension beyond the standard browser feature.
Besides, someone using this for a phishing method wouldn't use that attribute anyway.