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

tests/kernel/unsorted/this_test.dart

Index: tests/kernel/unsorted/this_test.dart
diff --git a/tests/html/js_dispatch_property_test_lib.dart b/tests/kernel/unsorted/this_test.dart
similarity index 60%
copy from tests/html/js_dispatch_property_test_lib.dart
copy to tests/kernel/unsorted/this_test.dart
index 77e371cf389debdb006e2568d6676d2a68fad97b..06a0ce61f172555ebfa49182e217e029e0c47ee3 100644
--- a/tests/html/js_dispatch_property_test_lib.dart
+++ b/tests/kernel/unsorted/this_test.dart
@@ -2,15 +2,14 @@
 // 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.
 
-@JS()
-library js_dispatch_property_test_lib;
+import 'expect.dart';
 
-import 'package:js/js.dart';
-
-@JS()
-external A create();
-
-@JS() @anonymous
 class A {
-  external String foo(String x);
+  getThis() => this;
+}
+
+main() {
+  var a = new A();
+  Expect.isTrue(a == a.getThis());
+  Expect.isTrue(identical(a, a.getThis()));
 }