title is wrong, the spec is not ignored. spec says: " When an element’s autofill field name is "off", the user agent should not remember the control’s data, and should not offer past values to the user. "

please note that it uses "should", not "must". these words have precise definition in specs, see RFC2119:

" SHOULD This word, or the adjective "RECOMMENDED", mean that there may exist valid reasons in particular circumstances to ignore a particular item, but the full implications must be understood and carefully weighed before choosing a different course. "

one may argue whether chrome has valid reasons or not, but saying they ignore it is incorrect.