VM Service isolate listing

runtime/bin/vmservice/service_request_router.dart

Index: runtime/bin/vmservice/service_request_router.dart
diff --git a/pkg/watcher/lib/watcher.dart b/runtime/bin/vmservice/service_request_router.dart
similarity index 69%
copy from pkg/watcher/lib/watcher.dart
copy to runtime/bin/vmservice/service_request_router.dart
index c4824b8ec86518a118e48104d01b1efeb8a31680..7ab55bac238b4416c88169060128602a5c029df2 100644
--- a/pkg/watcher/lib/watcher.dart
+++ b/runtime/bin/vmservice/service_request_router.dart
@@ -2,7 +2,8 @@
 // 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 watcher;
+part of vmservice;
 
-export 'src/watch_event.dart';
-export 'src/directory_watcher.dart';
+abstract class ServiceRequestRouter {
+  bool route(ServiceRequest request);
+}