Migrate block 43.

tests/language_strong/bailout5_test.dart

-// Copyright (c) 2013, 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";
-
-// Test to make sure the bailout environment in dart2js is correct.
-
-var global;
-
-class A {
-  var array;
-
-  initArray() {
-    return global[0] == null ? [null] : new Map();
-  }
-
-  bar() {
-    array = initArray();
-    do {
-      var element = array[0]; // bailout here
-      if (element is Map) continue;
-      if (element == null) break;
-    } while (true);
-    return global[0]; // bailout here
-  }
-
-  baz() {
-    do {
-      var element = bar();
-      if (element == null) return global[0]; // bailout here
-      if (element is Map) continue;
-      if (element is num) break;
-    } while (true);
-    return global[0]; // bailout here
-  }
-}
-
-void main() {
-  global = [1];
-  for (int i = 0; i < 2; i++) {
-    Expect.equals(1, new A().baz());
-    Expect.equals(1, new A().bar());
-  }
-  global = new Map();
-  for (int i = 0; i < 2; i++) {
-    Expect.equals(null, new A().baz());
-    Expect.equals(null, new A().bar());
-  }
-
-  global[0] = 42;
-  for (int i = 0; i < 2; i++) {
-    Expect.equals(42, new A().baz());
-    Expect.equals(42, new A().bar());
-  }
-}