Change IllegalArgumentException to ArgumentError.

tests/html/svgelement_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('SVGElementTest');
 #import('../../pkg/unittest/unittest.dart');
 #import('../../pkg/unittest/html_config.dart');
 #import('dart:html');
 
 main() {
@@ skipping 32 matching lines @@
         Expect.isTrue(el is SVGSVGElement);
         Expect.equals("<circle></circle><path></path>", el.innerHTML);
         Expect.equals(svg, el.outerHTML);
       });
 
       test('has no parent', () =>
         Expect.isNull(new SVGElement.svg('<circle/>').parent));
 
       test('empty', () {
         Expect.throws(() => new SVGElement.svg(""),
-            (e) => e is IllegalArgumentException);
+            (e) => e is ArgumentError);
       });
 
       test('too many elements', () {
         Expect.throws(
             () => new SVGElement.svg("<circle></circle><path></path>"),
-            (e) => e is IllegalArgumentException);
+            (e) => e is ArgumentError);
       });
     });
 
     testConstructor('a', (e) => e is SVGAElement);
     testConstructor('altGlyphDef', (e) => e is SVGAltGlyphDefElement);
     testConstructor('altGlyph', (e) => e is SVGAltGlyphElement);
     testConstructor('animateColor', (e) => e is SVGAnimateColorElement);
     testConstructor('animate', (e) => e is SVGAnimateElement);
     // WebKit doesn't recognize animateMotion
     // testConstructor('animateMotion', (e) => e is SVGAnimateMotionElement);
@@ skipping 111 matching lines @@
       Expect.listEquals(["circle", "path"], _nodeStrings(el.elements));
     });
 
     test('set', () {
       final el = new SVGSVGElement();
       el.elements = [new SVGElement.tag("circle"), new SVGElement.tag("path")];
       Expect.equals('<circle></circle><path></path>', el.innerHTML);
     });
   });
 }