Chromium

• Changed: service worker: Client.postMessage() is buffered until the document is ready.

  Status	In development	→	Enabled by default
  Android	(n/a)	→	74
  Desktop	(n/a)	→	74

• Changed: EME Extension: HDCP Policy Check

  Status	Origin trial	→	Enabled by default
  Android	(n/a)	→	73
  Desktop	69	→	73