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
webkit_web_extension_send_message_to_context_finish() to get the message reply.
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 webkit_web_extension_send_message_to_context_finish() to get the message reply.