Change IllegalArgumentException to ArgumentError.

tests/html/xmldocument_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #library('XMLDocumentTest');
 #import('../../pkg/unittest/unittest.dart');
 #import('../../pkg/unittest/html_config.dart');
 #import('dart:html');
 
 main() {
   useHtmlConfiguration();
 
   XMLDocument makeDocument() => new XMLDocument.xml("<xml><foo/><bar/></xml>");
 
   group('constructor', () {
     test('with a well-formed document', () {
       final doc = makeDocument();
       Expect.isTrue(doc is XMLDocument);
       Expect.equals('foo', doc.elements[0].tagName);
       Expect.equals('bar', doc.elements[1].tagName);
     });
 
     // TODO(nweiz): re-enable this when Document#query matches the root-level
     // element. Otherwise it fails on Firefox.
     //
     // test('with a parse error', () {
     //   Expect.throws(() => new XMLDocument.xml("<xml></xml>foo"),
-    //       (e) => e is IllegalArgumentException);
+    //       (e) => e is ArgumentError);
     // });
 
     test('with a PARSERERROR tag', () {
       final doc = new XMLDocument.xml("<xml><parsererror /></xml>");
       Expect.equals('parsererror', doc.elements[0].tagName);
     });
   });
 
   // FilteredElementList is tested more thoroughly in DocumentFragmentTests.
   group('elements', () {
@@ skipping 572 matching lines @@
     test('manifest', () => Expect.equals('', makeDocument().manifest));
   });
 
   test('unsupported operations', () {
     expectUnsupported(() { makeDocument().body = new XMLElement.tag('xml'); });
     expectUnsupported(() => makeDocument().cookie);
     expectUnsupported(() { makeDocument().cookie = 'foo'; });
     expectUnsupported(() { makeDocument().manifest = 'foo'; });
   });
 }