Big merge from experimental to bleeding edge.

tests/compiler/dart2js/no_duplicate_stub_test.dart

 // 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.
 
 import 'compiler_helper.dart';
 
 const String TEST = r"""
 class A {
   foo({a, b}) {}
 }
@@ skipping 12 matching lines @@
 }
 
 baz(a) {
   if (a is B) a.foo(a: 42);
 }
 """;
 
 main() {
   String generated = compileAll(TEST);
   RegExp regexp = new RegExp('foo\\\$1\\\$a: function');
-  Iterator<Match> matches = regexp.allMatches(generated).iterator();
+  Iterator<Match> matches = regexp.allMatches(generated).iterator;
   checkNumberOfMatches(matches, 1);
 }