unittest step2: bye bye to multiple entrypoints for unittest

client/tests/client/dom/HistoryTest.dart

Index: client/tests/client/dom/HistoryTest.dart
diff --git a/client/tests/client/dom/HistoryTest.dart b/client/tests/client/dom/HistoryTest.dart
index e606dcbc40316ca2a9e6a238492a0217c8e99193..7cb61a5b7c66b667f99db0af5e643702ae4f2247 100644
--- a/client/tests/client/dom/HistoryTest.dart
+++ b/client/tests/client/dom/HistoryTest.dart
@@ -1,9 +1,10 @@
 #library('HistoryTest');
-#import('../../../../lib/unittest/unittest_dom.dart');
+#import('../../../../lib/unittest/unittest.dart');
+#import('../../../../lib/unittest/dom_config.dart');
 #import('dart:dom');
 
 main() {
-  forLayoutTests();
+  useDomConfiguration();
   test('History', () {
     window.history.pushState(null, document.title, '?foo=bar');
     expect(window.history.length).equals(2);