Interface required to allow the TCP server-socket object in the parent process
to talk to the parent IPC actor.
It is used in the server socket implementation on the parent side.
Trigger a callback in the content process when the socket accepts any request.
| socket | The socket generated in accepting any open request on the parent side. |
Trigger a callback in the content process when an error occurs.
| message | The error message. |
| filename | The file name in which the error occured. |
| lineNumber | The line number in which the error occured. |
| columnNumber | The column number in which the error occured. |