WebContext.initializeNotificationPermissions

Sets initial desktop notification permissions for the context.

allowed_origins and disallowed_origins must each be #GList of #WebKitSecurityOrigin objects representing origins that will, respectively, either always or never have permission to show desktop notifications. No #WebKitNotificationPermissionRequest will ever be generated for any of the security origins represented in allowed_origins or disallowed_origins. This function is necessary because some webpages proactively check whether they have permission to display notifications without ever creating a permission request.

This function only affects web processes that have not already been created. The best time to call it is when handling #WebKitWebContext::initialize-notification-permissions so as to ensure that new web processes receive the most recent set of permissions.