Handle named and optional arguments in cps-ir.

tests/compiler/dart2js/js_backend_cps_ir_basic.dart

 // Copyright (c) 2014, 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.
 
 // Tests for basic functionality.
 
 library basic_tests;
 
 import 'js_backend_cps_ir_test.dart';
 
 const List<TestEntry> tests = const [
+  const TestEntry("""
+foo(a, [b = "b"]) => b;
+bar(a, {b: "b", c: "c"}) => c;
+main() {
+  foo(0);
+  foo(0, 1);
+  bar(0);
+  bar(0, b: 1);
+  bar(0, c: 1);
+  bar(0, b: 1, c: 2);
+}
+""",
+"""
+function() {
+  V.foo(0, "b");
+  V.foo(0, 1);
+  V.bar(0, "b", "c");
+  V.bar(0, 1, "c");
+  V.bar(0, "b", 1);
+  V.bar(0, 1, 2);
+  return null;
+}"""),
   const TestEntry(
   """
 foo(a) {
   return a;
 }
 main() {
   var a = 10;
   var b = 1;
   var t;
   t = a;
@@ skipping 24 matching lines @@
   """function() {
   return V.foo();
 }"""),
   const TestEntry("main() {}"),
   const TestEntry("main() { return 42; }"),
   const TestEntry("main() { return; }", """
 function() {
   return null;
 }"""),
 ];