Fix bug when using super and prefixes as a parenthesis expression

tests/compiler/dart2js_extra/23486_test.dart

+// Copyright (c) 2015, 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.
+
+// Regression test for http://dartbug.com/23486/
+//
+// Dart2js used to crash when using `super` and prefixes inside parenthesized
+// expressions.
+import 'package:expect/expect.dart';
+
+import '23486_helper.dart' as p;
+
+class B {
+  var field = 1;
+}
+
+class A extends B {
+  m() {
+    (super).field = 1; /// 01: compile-time error
+  }
+}
+
+class C {
+  C();
+  C.name();
+}
+
+class D extends C {
+  D() : super();
+  D.name() : (super).name(); /// 02: compile-time error
+}
+
+main() {
+  Expect.throws(new A().m);          /// 01: continued
+  Expect.throws(() => new D.name()); /// 02: continued
+  Expect.throws(() => (p).x);        /// 03: static type warning
+}
+