unittest step2: bye bye to multiple entrypoints for unittest

client/tests/client/dom/DOMIsolatesTest.dart

Index: client/tests/client/dom/DOMIsolatesTest.dart
diff --git a/client/tests/client/dom/DOMIsolatesTest.dart b/client/tests/client/dom/DOMIsolatesTest.dart
index faa046e62e58d10ea988088636ed5b5f49ada2d2..03a1e37c4815dee33e314708103db829a3d93ab2 100644
--- a/client/tests/client/dom/DOMIsolatesTest.dart
+++ b/client/tests/client/dom/DOMIsolatesTest.dart
@@ -1,5 +1,6 @@
 #library('DOMIsolatesTest');
-#import('../../../../lib/unittest/unittest_dom.dart');
+#import('../../../../lib/unittest/unittest.dart');
+#import('../../../../lib/unittest/dom_config.dart');
 #import('dart:dom');
 #import('dart:isolate');
 
@@ -26,7 +27,7 @@ isolateMainTrampoline(port) {
 }
 
 main() {
-  forLayoutTests();
+  useDomConfiguration(isLayoutTest: true);
 
   final iframe = document.createElement('iframe');
   document.body.appendChild(iframe);