Visit parenthesized expressions in compile-time constants.

tests/language/src/CompileTimeConstantJTest.dart

Index: tests/language/src/CompileTimeConstantJTest.dart
diff --git a/tests/language/src/CompileTimeConstantJTest.dart b/tests/language/src/CompileTimeConstantJTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..049d6c9080c0737766a0ee7015cba17401bc2310
--- /dev/null
+++ b/tests/language/src/CompileTimeConstantJTest.dart
@@ -0,0 +1,18 @@
+// 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.
+
+class A {
+  final field;
+  const A() : field = 499;
+}
+
+final x = (((1 + 2)));
+final y = (((((x)))));
+final z = (((const A())));
+
+main() {
+  Expect.equals(3, x);
+  Expect.equals(3, y);
+  Expect.equals(499, z.field);
+}