Override a CKEditor notification message

There are some applications that needs changing the default notification message of a CKEditor plugin. Like this case, I have application that needs to check the size of a file being uploaded against the maximum file size limit allowed on a Drupal site and the upload should abort if it exceeds. Using this upload.abort(); method will display "Upload aborted by the user." notification message which obviously not applicable to the situation. The following code snippet will override the notification generated by uploadwidget plugin: