Remove FileError interface

third_party/WebKit/Source/devtools/front_end/externs.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 733 matching lines @@
     this.type;
     /** @type {string} */
     this.syntax;
     /** @type {!Gonzales.Location} */
     this.start;
     /** @type {!Gonzales.Location} */
     this.end;
     /** @type {(string|!Array<!Gonzales.Node>)} */
     this.content;
 }
+
+/**
+ * @type {string}
+ * @see http://heycam.github.io/webidl/#es-DOMException-prototype-object
+ * TODO(jsbell): DOMException should be a subclass of Error.
+ */
+DOMException.prototype.message;