unittest step2: bye bye to multiple entrypoints for unittest

tests/isolate/src/APIv2_unresolvedPortsBrowserNegativeTest.dart

Index: tests/isolate/src/APIv2_unresolvedPortsBrowserNegativeTest.dart
diff --git a/tests/isolate/src/APIv2_unresolvedPortsBrowserNegativeTest.dart b/tests/isolate/src/APIv2_unresolvedPortsBrowserNegativeTest.dart
index 11bdddf1aae1cc5d0f361c7f90e19825dab40bf0..f4ac24d239f9ea48a467935cb993fe458d2c5ab7 100644
--- a/tests/isolate/src/APIv2_unresolvedPortsBrowserNegativeTest.dart
+++ b/tests/isolate/src/APIv2_unresolvedPortsBrowserNegativeTest.dart
@@ -6,7 +6,8 @@
 #library('unresolved_ports');
 #import('dart:dom'); // import added so test.dart can treat this as a webtest.
 #import('dart:isolate');
-#import('../../../lib/unittest/unittest_dom.dart');
+#import('../../../lib/unittest/unittest.dart');
+#import('../../../lib/unittest/dom_config.dart');
 
 // This is similar to APIv2_unresolvedPortsStandaloneNegativeTest but using
 // 'unittest.dart' so it can run to completion in browsers.
@@ -28,6 +29,7 @@ bobIsolate() {
 }
 
 main() {
+  useDomConfiguration();
   asyncTest('Message chain with unresolved ports', 1, () {
     ReceivePort port = new ReceivePort();
     port.receive((msg, _) {