Automagically change the meaning of 'next' to 'async-next' when paused at an async function at awai…

runtime/observatory/tests/service/test_helper.dart

 // Copyright (c) 2013, 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.
 
 library test_helper;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'package:observatory/service_io.dart';
@@ skipping 191 matching lines @@
 
 IsolateTest stoppedAtLine(int line) {
   return (Isolate isolate) async {
     print("Checking we are at line $line");
 
     ServiceMap stack = await isolate.getStack();
     expect(stack.type, equals('Stack'));
     expect(stack['frames'].length, greaterThanOrEqualTo(1));
 
     Frame top = stack['frames'][0];
+    print("We are at $top");
     Script script = await top.location.script.load();
     expect(script.tokenToLine(top.location.tokenPos), equals(line));
   };
 }
 
 
 Future<Isolate> resumeIsolate(Isolate isolate) {
   Completer completer = new Completer();
   isolate.vm.getEventStream(VM.kDebugStream).then((stream) {
     var subscription;
@@ skipping 90 matching lines @@
       }, onError: (e, st) {
         process.requestExit();
         if (!_isWebSocketDisconnect(e)) {
           print('Unexpected exception in service tests: $e $st');
           throw e;
         }
       });
     });
   }
 }