Add step OverAwait to service protocol

runtime/observatory/tests/service/async_continuation_test.dart

-// Copyright (c) 2015, 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.
-// VMOptions=--error_on_bad_type --error_on_bad_override --verbose-debug
-
-import 'dart:async';
-import 'dart:developer';
-import 'package:observatory/service_io.dart';
-import 'package:unittest/unittest.dart';
-import 'test_helper.dart';
-
-foo() {}
-
-doSync() {
-  foo();  // Line 15
-}
-
-doAsync() async {
-  foo();  // Line 19
-  await null;
-}
-
-doAsyncStar() async* {
-  foo();  // Line 24
-  yield null;
-}
-
-testeeDo() {
-  debugger();
-
-  doSync();
-
-  doAsync();
-
-  doAsyncStar().listen((_) => null);
-}
-
-test(Isolate isolate) async {
-  await isolate.rootLibrary.load();
-  var script = isolate.rootLibrary.scripts[0];
-
-  var bp1 = await isolate.addBreakpoint(script, 15);
-  expect(bp1, isNotNull);
-  expect(bp1 is Breakpoint, isTrue);
-
-  var bp2 = await isolate.addBreakpoint(script, 19);
-  expect(bp2, isNotNull);
-  expect(bp2 is Breakpoint, isTrue);
-
-  var bp3 = await isolate.addBreakpoint(script, 24);
-  expect(bp3, isNotNull);
-  expect(bp3 is Breakpoint, isTrue);
-
-  isolate.resume();
-
-  var bp1_hit = new Completer();
-  var bp2_hit = new Completer();
-  var bp3_hit = new Completer();
-
-  var stream = await isolate.vm.getEventStream(VM.kDebugStream);
-  stream.listen((ServiceEvent event) async {
-    print("Event: $event");
-    if (event.kind == ServiceEvent.kPauseBreakpoint) {
-      var bp = event.breakpoint;
-      print('Hit $bp');
-      if (bp == bp1) {
-        await stoppedAtLine(15)(isolate);
-        print(event.asyncContinuation);
-        expect(event.asyncContinuation, equals(null));
-        isolate.resume();
-        bp1_hit.complete(null);
-      }
-      if (bp == bp2) {
-        await stoppedAtLine(19)(isolate);
-        print(event.asyncContinuation);
-        expect(event.asyncContinuation.isClosure, isTrue);
-        isolate.resume();
-        bp2_hit.complete(null);
-      }
-      if (bp == bp3) {
-        await stoppedAtLine(24)(isolate);
-        print(event.asyncContinuation);
-        expect(event.asyncContinuation.isClosure, isTrue);
-        isolate.resume();
-        bp3_hit.complete(null);
-      }
-    }
-  });
-
-  await bp1_hit.future;
-  await bp2_hit.future;
-  await bp3_hit.future;
-}
-
-main(args) => runIsolateTests(args, [test], testeeConcurrent: testeeDo);