type String - Possible values include service-worker.
serviceWorkerServiceWorkerMainReadonly - The service worker that sent this message
versionId Number - The service worker version ID.
session Session - The Session instance with which the event is associated.
returnValue any - Set this to the value to be returned in a synchronous message
portsMessagePortMain[] - A list of MessagePorts that were transferred with this message
reply Function - A function that will send an IPC message to the renderer frame that sent the original message that you are currently handling. Diese Methode sollte verwendet werden, um auf die gesendete Nachricht zu antworten, um sicherzustellen, dass die Antwort an den richtigen Prozess und Frame weitergeleitet wird.