Add getIsolateID to Service class in dart:developer

runtime/observatory/tests/service/service_test_common.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.
 
 library service_test_common;
 
 import 'dart:async';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/service_common.dart';
 import 'package:unittest/unittest.dart';
@@ skipping 139 matching lines @@
       return false;
   }
 }
 
 Future<Isolate> hasPausedFor(Isolate isolate, String kind) {
   // Set up a listener to wait for breakpoint events.
   Completer completer = new Completer();
   isolate.vm.getEventStream(VM.kDebugStream).then((stream) {
     var subscription;
     subscription = stream.listen((ServiceEvent event) {
-        if (event.kind == kind) {
+        if ((isolate == event.isolate) && (event.kind == kind)) {
           if (completer != null) {
             // Reload to update isolate.pauseEvent.
             print('Paused with $kind');
             subscription.cancel();
             completer.complete(isolate.reload());
             completer = null;
           }
         }
     });
 
@@ skipping 197 matching lines @@
 
 Future<Instance> rootLibraryFieldValue(Isolate isolate,
                                        String fieldName) async {
   Library rootLib = await isolate.rootLibrary.load();
   Field field = rootLib.variables.singleWhere((v) => v.name == fieldName);
   await field.load();
   Instance value = field.staticValue;
   await value.load();
   return value;
 }