Migrate dom tests to dart:html.

tests/dom/websocket_test.dart

Index: tests/dom/websocket_test.dart
diff --git a/tests/dom/websocket_test.dart b/tests/dom/websocket_test.dart
index 238003bfa8a9b3d423f6a051c33b6f52d7bff876..84ca3758159397bc99c6e5e228c31f07299dc5ea 100644
--- a/tests/dom/websocket_test.dart
+++ b/tests/dom/websocket_test.dart
@@ -1,11 +1,11 @@
 #library('WebSocketTest');
 #import('../../lib/unittest/unittest.dart');
-#import('../../lib/unittest/dom_config.dart');
-#import('dart:dom');
+#import('../../lib/unittest/html_config.dart');
+#import('dart:html');
 
 main() {
 
-  useDomConfiguration();
+  useHtmlConfiguration();
 
   test('constructorTest', () {
       var socket = new WebSocket('ws://localhost');