Remove all warnings from dart2js and add a test to prevent introduction of new.

dart/tests/utils/dart2js_test.dart

Index: dart/tests/utils/dart2js_test.dart
diff --git a/dart/tests/utils/dart2js_test.dart b/dart/tests/utils/dart2js_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..f7786fb4ce8ab14c01845c3e0167c973d150b988
--- /dev/null
+++ b/dart/tests/utils/dart2js_test.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Test to ensure that dart2js is free of warnings.
+
+// Test annotation to let the test framework know that this file
+// should analyze without any warnings.
+// @static-clean
+
+import '../../sdk/lib/_internal/compiler/implementation/dart2js.dart'

[Anton Muhin, 2012/12/11 11:20:54]

Peter, we should use old style import here due to the wrapping we do :(

Otherwise, it breaks drt tests, alas

[ahe, 2012/12/11 14:48:23]

As you later discovered, it is not the import syntax that is the problem.  The
problem is that there is no library declaration.  This is a know bug in Dartium
tests and getting rid of wrapping will fix that bug.

Regardless, it is fine that this test fails on Dartium.  The sole purpose of
this test is to ensure that dart2js is free of warnings.

+    as dart2js;
+
+void main() {
+  // Do nothing.
+}