[kernel] offsets on direct property get/set

runtime/observatory/tests/service/step_through_property_set_test.dart

+// Copyright (c) 2017, 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 'test_helper.dart';
+import 'service_test_common.dart';
+
+const int LINE = 33;
+const String file = "step_through_property_set_test.dart";
+
+code() {
+  Bar bar = new Bar();
+  bar.doStuff();
+}
+
+class Foo {
+  final List<String> data1;
+
+  Foo() : data1 = ["a", "b", "c"];
+
+  void doStuff() {
+    data1[1] = 'x';
+    print(data1[1]);
+  }
+}
+
+class Bar extends Foo {
+  final List<String> data2;
+
+  Bar() : data2 = ["d", "e", "f"];
+
+  void doStuff() {
+    data2[1] = '1';
+    print(data2[1]);
+
+    data1[1] = '2';
+    print(data1[1]);
+
+    super.data1[1] = '42';
+    print(super.data1[1]);
+  }
+}
+
+List<String> stops = [];
+List<String> expected = [
+  "$file:${LINE+0}:5", // on 'data2'
+  "$file:${LINE+0}:10", // on '['
+  "$file:${LINE+1}:11", // on 'data2'
+  "$file:${LINE+1}:16", // on '['
+  "$file:${LINE+1}:5", // on 'print'
+
+  "$file:${LINE+3}:5", // on 'data1'
+  "$file:${LINE+3}:10", // on '['
+  "$file:${LINE+4}:11", // on 'data1'
+  "$file:${LINE+4}:16", // on '['
+  "$file:${LINE+4}:5", // on 'print'
+
+  "$file:${LINE+6}:11", // on 'data1'
+  "$file:${LINE+6}:16", // on '['
+  "$file:${LINE+7}:17", // on 'data1'
+  "$file:${LINE+7}:22", // on '['
+  "$file:${LINE+7}:5", // on 'print'
+
+  "$file:${LINE+8}:3" // on ending '}'
+];
+
+var tests = [
+  hasPausedAtStart,
+  setBreakpointAtLine(LINE),
+  runStepIntoThroughProgramRecordingStops(stops),
+  checkRecordedStops(stops, expected,
+      debugPrint: true, debugPrintFile: file, debugPrintLine: LINE)
+];
+
+main(args) {
+  runIsolateTestsSynchronous(args, tests,
+      testeeConcurrent: code, pause_on_start: true, pause_on_exit: true);
+}