Revert "Merge more Kernel infrastructure from kernel_sdk SDK fork."

tests/kernel/unsorted/closures_test.dart

-// Copyright (c) 2016, 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 'expect.dart';
-
-class Base {
-  int constant1000() => 1000;
-}
-
-class Foo extends Base {
-  final int base;
-  Foo(this.base);
-
-  nestedAdderFunction(a, b, c, d, e) {
-    var result = a + b;
-    return () {
-      var result2 = c + d;
-      return () {
-        return base + result + result2 + e;
-      };
-    };
-  }
-
-  nestedAdderFunction2(a, b, c, d, e) {
-    var result = a + b;
-    return () {
-      var base = super.constant1000;
-      var result2 = c + d;
-      return () {
-        return base() + result + result2 + e;
-      };
-    };
-  }
-}
-
-nestedAdderFunction(a, b, c, d, e) {
-  var result = a + b;
-  return () {
-    var result2 = c + d;
-    return () {
-      return result + result2 + e;
-    };
-  };
-}
-
-main() {
-  Expect.isTrue(nestedAdderFunction(1, 2, 3, 4, 5)()() == 15);
-
-  var foo = new Foo(100);
-  Expect.isTrue(foo.nestedAdderFunction(1, 2, 3, 4, 5)()() == 115);
-  Expect.isTrue(foo.nestedAdderFunction2(1, 2, 3, 4, 5)()() == 1015);
-
-  var funs = [];
-  for (int i = 0; i < 3; i++) {
-    funs.add(() => i);
-  }
-  Expect.isTrue((funs[0]() + funs[1]() + funs[2]()) == 3);
-
-  var funs2 = [];
-  for (var i in [0, 1, 2]) {
-    funs2.add(() => i);
-  }
-  Expect.isTrue((funs2[0]() + funs2[1]() + funs2[2]()) == 3);
-}