Modified unittest to use new argument syntax.

tests/html/client_rect_test.dart

 #library('ClientRectTest');
 #import('../../pkg/unittest/unittest.dart');
 #import('../../pkg/unittest/html_config.dart');
 #import('dart:html');
 
 main() {
 
   insertTestDiv() {
     var element = new Element.tag('div');
     element.innerHTML = r'''
     A large block of text should go here. Click this
     block of text multiple times to see each line
     highlight with every click of the mouse button.
     ''';
     document.body.nodes.add(element);
     return element;
   }
 
   useHtmlConfiguration();
 
    test("ClientRectList test", () {
     insertTestDiv();
     var range = document.createRange();
     List<ClientRect> rects = range.getClientRects();

[Jennifer Messerly, 2012/10/26 02:57:05]

fyi, this was a pre-existing problem but: I would make this "var", otherwise it
will blow up in checked mode before it gets to the isInstanceOf test.

[gram, 2012/10/26 22:26:27]

Done.

-    Expect.isTrue(rects is List<ClientRect>);
+    expect(rects, new isInstanceOf<List<ClientRect>>('List<ClientRect>'));
   });
 }