Address Peter's comments in https://codereview.chromium.org/11361059, and fix a host-checked mode b…

tests/language/typed_selector2_test.dart

Index: tests/language/typed_selector2_test.dart
===================================================================
--- tests/language/typed_selector2_test.dart	(revision 0)
+++ tests/language/typed_selector2_test.dart	(revision 0)
@@ -0,0 +1,22 @@
+// 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 for dart2js to handle a typed selector with a typedef as a
+// receiver type.
+
+getComparator() => (a, b) => 42;
+
+class A {
+  foo() => 42;
+}
+
+main() {
+  Comparator a = getComparator();
+  if (a(1, 2) != 42) {
+    // This call used to crash dart2js because 'foo' was a typed
+    // selector with a typedef as a receiver type.
+    a.foo();
+  }
+  var b = new A();
+  b.foo();
+}