Chromium

• Changed: Rename Intl.DateTimeFormat.prototype.formatToParts type "dayperiod" to "dayPeriod"

  Status	In development	→	Enabled by default
  Android	(n/a)	→	71
  Desktop	(n/a)	→	71

• Changed: Remove window.event for Shadow DOM

  Android	(n/a)	→	64

• Changed: HTMLObjectElement.contentWindow

  Status	In development	→	Enabled by default
  Android	(n/a)	→	53
  Desktop	(n/a)	→	53

• Changed: Tail calls elimination (ES6)

  Status	No active development	→	No longer pursuing

• Added: ErrorEvent interface on web workers

  Status	In development