Migrate test block 9 to Dart 2.0

tests/corelib_strong/indexed_list_access_test.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.
-
-import "package:expect/expect.dart";
-
-// Check that indexed access to lists throws correct exception if index
-// is not int.
-
-main() {
-  checkList(new List(10));
-  var growable = new List();
-  growable.add(1);
-  growable.add(1);
-  checkList(growable);
-}
-
-checkList(var list) {
-  // Check unoptimized.
-  Expect.isFalse(checkCatch(getIt, list, 1));
-  Expect.isTrue(checkCatch(getIt, list, "hi"));
-  Expect.isFalse(checkCatch(putIt, list, 1));
-  Expect.isTrue(checkCatch(putIt, list, "hi"));
-  // Optimize 'getIt' and 'putIt'.
-  for (int i = 0; i < 2000; i++) {
-    putIt(list, 1);
-    getIt(list, 1);
-  }
-  Expect.isTrue(checkCatch(getIt, list, "hi"));
-  Expect.isTrue(checkCatch(putIt, list, "hi"));
-}
-
-checkCatch(var f, var list, var index) {
-  try {
-    f(list, index);
-  } on ArgumentError catch (e) {
-    return true;
-  } on TypeError catch (t) {
-    return true; // thrown in type checked mode.
-  }
-  return false;
-}
-
-getIt(var a, var i) {
-  return a[i];
-}
-
-putIt(var a, var i) {
-  a[i] = null;
-}