Fix handling of type literals.

tests/language/dynamic_type_literal_test.dart

Index: tests/language/dynamic_type_literal_test.dart
diff --git a/tests/compiler/dart2js_extra/16407_test.dart b/tests/language/dynamic_type_literal_test.dart
similarity index 64%
copy from tests/compiler/dart2js_extra/16407_test.dart
copy to tests/language/dynamic_type_literal_test.dart
index aff1ba337ddab1eb5d219ac635653b48d4f8d1bc..335e9ae70a2bd61eeaed2c7475eb25c4ae4de407 100644
--- a/tests/compiler/dart2js_extra/16407_test.dart
+++ b/tests/language/dynamic_type_literal_test.dart
@@ -2,15 +2,11 @@
 // 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.
 
-import "package:expect/expect.dart";
+// Test generation of 'dynamic' type literals.
 
-// Regression test for Issue 16407.
+import "package:expect/expect.dart";
 
 void main() {
-  foo(null, true);
-  foo('x', false);
+  Expect.isTrue(dynamic is Type);
+  Expect.isFalse(dynamic == Type);
 }
-
-var foo = (x, result) {
-  Expect.equals(result, x is Null, '$x is Null');
-};