Send message to the #WebKitWebContext corresponding to extension. If message is floating, it's consumed.
If you don't expect any reply, or you simply want to ignore it, you can pass null as calback. When the operation is finished, callback will be called. You can then call webkitwebprocessextension.web_process_extension.WebProcessExtension.sendMessageToContextFinish to get the message reply.
a #WebKitUserMessage
a #GCancellable or null to ignore
A #GAsyncReadyCallback to call when the request is satisfied or null
Send message to the #WebKitWebContext corresponding to extension. If message is floating, it's consumed.
If you don't expect any reply, or you simply want to ignore it, you can pass null as calback. When the operation is finished, callback will be called. You can then call webkitwebprocessextension.web_process_extension.WebProcessExtension.sendMessageToContextFinish to get the message reply.