Expands on previous function RTT to support named/optional parameters.

tests/language/src/FunctionTypeAlias2Test.dart

+// Copyright (c) 2011, 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.
+// VMOptions=--enable_type_checks
+//
+// Dart test for function type alias with named optional parameters.
+
+typedef int f1<T>([int a, int b, T c]);
+typedef int f2<T>([int a, int b, T d]);
+
+class A<T> {
+  int baz([int a, int b, T c]) {
+  }
+}
+
+int baz([int a, int b, int c]) {
+}
+
+main() {
+  Expect.isTrue(baz is f1);
+  Expect.isTrue(baz is f1<int>);
+  Expect.isFalse(baz is f1<double>);
+  Expect.isFalse(baz is f2);
+  Expect.isFalse(baz is f2<int>);
+
+  A<int> a = new A<int>();
+  Expect.isTrue(a.baz is f1);
+  Expect.isTrue(a.baz is f1<int>);
+  Expect.isFalse(a.baz is f1<double>);
+  Expect.isFalse(a.baz is f2);
+  Expect.isFalse(a.baz is f2<int>);
+}