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

tests/kernel/unsorted/klass_field_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 file.
+
+import 'expect.dart';
+
+class A {
+  var intField = 1;
+  var doubleField = 3.1415;
+  var stringField = "hello";
+  var o;
+
+  A(this.o);
+}
+
+class B extends A {
+  var nullField = null;
+  var nullField2;
+
+  var n;
+  var m;
+
+  B(this.n, o) : super(o), m = "m";
+}
+
+main() {
+  var o = new B("n", "o");
+  Expect.isTrue(o.intField == 1);
+  Expect.isTrue(o.doubleField == 3.1415);
+  Expect.isTrue(o.stringField == "hello");
+  Expect.isTrue(o.nullField == null);
+  Expect.isTrue(o.nullField2 == null);
+  Expect.isTrue(o.m == 'm');
+  Expect.isTrue(o.n == 'n');
+  Expect.isTrue(o.o == 'o');
+}