unittest step2: bye bye to multiple entrypoints for unittest

client/tests/client/dom/InstanceOfTest.dart

Index: client/tests/client/dom/InstanceOfTest.dart
diff --git a/client/tests/client/dom/InstanceOfTest.dart b/client/tests/client/dom/InstanceOfTest.dart
index 7bd361bf2b2e4f91ca903f45a6fd0f28085ea49a..5a3707a8f64a71b711554dd35d0a76a124a71cf9 100644
--- a/client/tests/client/dom/InstanceOfTest.dart
+++ b/client/tests/client/dom/InstanceOfTest.dart
@@ -1,5 +1,6 @@
 #library('InstanceOfTest');
-#import('../../../../lib/unittest/unittest_dom.dart');
+#import('../../../../lib/unittest/unittest.dart');
+#import('../../../../lib/unittest/dom_config.dart');
 #import('dart:dom');
 
 main() {
@@ -10,7 +11,7 @@ main() {
   canvas.setAttribute('height', '100');
   document.body.appendChild(canvas);
 
-  forLayoutTests();
+  useDomConfiguration();
   test('Instanceof', () {
     Expect.isFalse(canvas is CanvasRenderingContext);
     Expect.isFalse(canvas is CanvasRenderingContext2D);