Migrate dom tests to dart:html.

client/tests/client/dom/CallbacksTest.dart

Index: client/tests/client/dom/CallbacksTest.dart
diff --git a/client/tests/client/dom/CallbacksTest.dart b/client/tests/client/dom/CallbacksTest.dart
index a120e15b92c190932682caa981a6224960979125..c4c992b14677fb79a3e50301bacf8ef620eb3da7 100644
--- a/client/tests/client/dom/CallbacksTest.dart
+++ b/client/tests/client/dom/CallbacksTest.dart
@@ -1,10 +1,10 @@
 #library('CallbacksTest');
 #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('RequestAnimationFrameCallback', () {
     window.webkitRequestAnimationFrame((int time) => false);
   });