unittest step2: bye bye to multiple entrypoints for unittest

tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart

Index: tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart
diff --git a/tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart b/tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart
index 330cd4d67ae049d414d2a22c025e437b708d6786..e5c7bd6f07ab35644d9ee65298a2183046536eba 100644
--- a/tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart
+++ b/tests/isolate/src/APIv2_spawnBrowserNegativeTest.dart
@@ -4,7 +4,8 @@
 
 // Negative test to make sure that we are reaching all assertions.
 #library('spawn_tests');
-#import('../../../lib/unittest/unittest_dom.dart');
+#import('../../../lib/unittest/unittest.dart');
+#import('../../../lib/unittest/dom_config.dart');
 #import('dart:dom'); // import added so test.dart can treat this as a webtest.
 #import('dart:isolate');
 
@@ -13,6 +14,7 @@ child() {
 }
 
 main() {
+  useDomConfiguration();
   asyncTest('message - reply chain', 1, () {
     ReceivePort port = new ReceivePort();
     port.receive((msg, _) {