Change IllegalArgumentException to ArgumentError.

tests/html/element_test.dart

 // Copyright (c) 2011, 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('ElementTest');
 #import('../../pkg/unittest/unittest.dart');
 #import('../../pkg/unittest/html_config.dart');
 #import('dart:html');
 
 expectLargeRect(ClientRect rect) {
@@ skipping 67 matching lines @@
       Expect.equals(rect.bounding.left, 8);
       Expect.equals(rect.bounding.top, 8);
       Expect.isTrue(rect.clientRects.length > 0);
       container.remove();
     }));
   });
 
   group('constructors', () {
     test('error', () {
       Expect.throws(() => new Element.html('<br/><br/>'),
-          (e) => e is IllegalArgumentException);
+          (e) => e is ArgumentError);
     });
 
     test('.html has no parent', () =>
         Expect.isNull(new Element.html('<br/>').parent));
 
     test('a', () => testConstructorHelper('a', '<a>foo</a>', 'foo',
         (element) => element is AnchorElement));
     test('area', () => testConstructorHelper('area', '<area>foo</area>', '',
         (element) => element is AreaElement));
     // TODO(jacobr): audio tags cause tests to segfault when using dartium.
@@ skipping 644 matching lines @@
     });
 
     test('getRange', () {
       var range = makeElList().getRange(1, 2);
       Expect.isTrue(range is ElementList);
       Expect.isTrue(range[0] is ImageElement);
       Expect.isTrue(range[1] is InputElement);
     });
   });
 }