Migrate dom tests to dart:html.

client/tests/client/dom/WindowOpenTest.dart

Index: client/tests/client/dom/WindowOpenTest.dart
diff --git a/client/tests/client/dom/WindowOpenTest.dart b/client/tests/client/dom/WindowOpenTest.dart
index a16b280c7417a44347df3e321643fea2c0271a7c..0e7d81c2e6fcd48415504d3c27cf2c85d246eb86 100644
--- a/client/tests/client/dom/WindowOpenTest.dart
+++ b/client/tests/client/dom/WindowOpenTest.dart
@@ -1,17 +1,17 @@
 #library('WindowOpenTest');
 #import('../../../../lib/unittest/unittest.dart');
-#import('../../../../lib/unittest/dom_config.dart');
-#import('dart:dom');
+#import('../../../../lib/unittest/html_config.dart');
+#import('dart:html');
 
 main() {
   evaluateJavaScript(code) {
-    final scriptTag = document.createElement('script');
+    final scriptTag = new Element.tag('script');
     scriptTag.innerHTML = code;
-    document.body.appendChild(scriptTag);
+    document.body.nodes.add(scriptTag);
   }
   evaluateJavaScript('layoutTestController.setCanOpenWindows()');
 
-  useDomConfiguration();
+  useHtmlConfiguration();
   asyncTest('TwoArgumentVersion', 1, () {
     Window win = window.open('../resources/pong.html', 'testWindow');
     closeWindow(win);