Migrate block 43.

tests/language/bailout2_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 "package:expect/expect.dart";
-
-var a;
-
-main() {
-  // Write a loop to force a bailout method on [A.foo].
-  for (int i = 0; i < 10; i++) {
-    if (a != null) new A().foo([]);
-    Expect.equals(42, new A().foo(new A()));
-  }
-}
-
-class A {
-  // In dart2js, the optimized version of foo tries to optimize the
-  // uses of a.length (which is used two times here: for the index,
-  // and for the bounds check), and that optmization used to crash
-  // the compiler.
-  foo(a) => a[a.length];
-
-  int get length => 42;
-  operator [](index) => 42;
-}