Migrate dom tests to dart:html.

tests/dom/dom_constructors_test.dart

Index: tests/dom/dom_constructors_test.dart
diff --git a/tests/dom/dom_constructors_test.dart b/tests/dom/dom_constructors_test.dart
index e61db62a15f5ccd3943b0ccf2a64ab19667c419f..87332350da9ccd800a051aa11b8cdab0d997a54a 100644
--- a/tests/dom/dom_constructors_test.dart
+++ b/tests/dom/dom_constructors_test.dart
@@ -1,10 +1,10 @@
 #library('DOMConstructorsTest');
 #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('FileReader', () {
     FileReader fileReader = new FileReader();
     Expect.equals(FileReader.EMPTY, fileReader.readyState);