Track changes to standalone vmservice in mojo and sky embedders.

sky/engine/core/script/dart_service_isolate/server.dart

Index: sky/engine/core/script/dart_service_isolate/server.dart
diff --git a/sky/engine/core/script/dart_service_isolate/server.dart b/sky/engine/core/script/dart_service_isolate/server.dart
index 4e069f97edcdb419f0b2ca6b4bbad737262242ff..f0d5f86f908de919bdd807dfd8ed08d4c5e2ce8c 100644
--- a/sky/engine/core/script/dart_service_isolate/server.dart
+++ b/sky/engine/core/script/dart_service_isolate/server.dart
@@ -29,7 +29,7 @@ class WebSocketClient extends Client {
         return;
       }
       var serial = map['id'];
-      onMessage(serial, new Message.fromJsonRpc(map));
+      onMessage(serial, new Message.fromJsonRpc(this, map));
     } else {
       socket.close(BINARY_MESSAGE_ERROR_CODE, 'Message must be a string.');
     }
@@ -151,7 +151,7 @@ class Server {
       request.response.close();
       return;
     }
-    var message = new Message.fromUri(request.uri);
+    var message = new Message.fromUri(this, request.uri);
     var client = new HttpRequestClient(request, _service);
     client.onMessage(null, message);
   }