Introduced support for external services registration in the ServiceProtocol

runtime/observatory/lib/src/repositories/isolate.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
 
 part of repositories;
 
 class IsolateRepository extends M.IsolateRepository {
+  final S.VM _vm;
+
+  Iterable<M.Service> get reloadSourcesServices =>
+      _vm.services.where((S.Service s) => s.service == 'reloadSources');
+
+  IsolateRepository(this._vm) {
+    assert(_vm == null);
+  }
+
   Future<M.Isolate> get(M.IsolateRef i) async {
     S.Isolate isolate = i as S.Isolate;
     assert(isolate != null);
     try {
       await isolate.reload();
     } on SC.NetworkRpcException catch (_) {
       /* ignore */
     }
     return isolate;
   }
 
-  Future reloadSources(M.IsolateRef i) async {
-    S.Isolate isolate = i as S.Isolate;
-    assert(isolate != null);
-    await isolate.reloadSources();
+  Future reloadSources(M.IsolateRef i, {M.Service service}) async {
+    if (service == null) {
+      S.Isolate isolate = i as S.Isolate;
+      assert(isolate != null);
+      await isolate.reloadSources();
+    } else {
+      S.Service srv = service as S.Service;
+      assert(srv != null);
+      await _vm.invokeRpcNoUpgrade(srv.method, {'isolateId': i.id});
+    }
   }
 }