JavaScript: Update model of DOMException.

cf. https://developer.mozilla.org/en-US/docs/Web/API/DOMException/DOMException

Author: Max Schaefer

javascript/externs/web/w3c_dom1.js

@@ -25,9 +25,11 @@
 
 /**
  * @constructor
+ * @param {string=} message
+ * @param {string=} message
  * @see http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/level-one-core.html#ID-17189187
  */
-function DOMException() {}
+function DOMException(message, name) {}
 
 /**
  * @type {number}