Run closed_world2_test using the normal compiler pipeline.

tests/compiler/dart2js/deferred_dont_inline_deferred_constants_test.dart

Index: tests/compiler/dart2js/deferred_dont_inline_deferred_constants_test.dart
diff --git a/tests/compiler/dart2js/deferred_dont_inline_deferred_constants_test.dart b/tests/compiler/dart2js/deferred_dont_inline_deferred_constants_test.dart
index 4210076a95005fbd9dcbb93e610a088619f2a76e..702cc7b59eb57a636ebc144e9564055c76632714 100644
--- a/tests/compiler/dart2js/deferred_dont_inline_deferred_constants_test.dart
+++ b/tests/compiler/dart2js/deferred_dont_inline_deferred_constants_test.dart
@@ -37,7 +37,8 @@ void main() {
     var foo2 = lib2.find("foo");
     var ou_lib2 = outputUnitForElement(foo2);
 
-    var fooMain = compiler.mainApp.find("foo");
+    var mainApp = compiler.mainApp;
+    var fooMain = mainApp.find("foo");
     var ou_lib1_lib2 = outputUnitForElement(fooMain);
 
     String mainOutput = collector.getOutput("", OutputType.js);