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

tests/kernel/unsorted/super_initializer_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.md file.
+
+import 'expect.dart';
+
+String log;
+init() { log = ''; }
+logit(msg) { return log = '$log$msg'; }
+
+class Base {
+  var b;
+  Base.arg0() : b = logit('b') {
+    logit('B');
+  }
+  Base.arg1(a) : b = logit('b') {
+    logit('B');
+  }
+  Base.arg2(a, b) : b = logit('b') {
+    logit('B');
+  }
+}
+
+class Sub extends Base {
+  var x;
+  var s;
+  Sub.arg0() : x = logit('x'), super.arg0(), s = logit('s') {
+    logit('S');
+  }
+  Sub.arg1(a) : x = logit('x'), super.arg1(logit('1')), s = logit('s') {
+    logit('S');
+  }
+  Sub.arg2(a, b) : x = logit('x'), super.arg2(logit('1'), logit('2')), s = logit('s') {
+    logit('S');
+  }
+}
+
+test(fun(), String result) {
+  init();
+  fun();
+  Expect.isTrue(log == result);
+}
+
+main() {
+  test(() => new Sub.arg0(), 'xsbBS');
+  test(() => new Sub.arg1(1), 'x1sbBS');
+  test(() => new Sub.arg2(1, 2), 'x12sbBS');
+}