Some cleanups in the code that posts results to service clients.

runtime/bin/vmservice/server.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.
 
 part of vmservice_io;
 
 class WebSocketClient extends Client {
   static const int PARSE_ERROR_CODE = 4000;
   static const int BINARY_MESSAGE_ERROR_CODE = 4001;
   static const int NOT_MAP_ERROR_CODE = 4002;
   final WebSocket socket;
 
-  WebSocketClient(this.socket, service) : super(service) {
+  WebSocketClient(this.socket, VMService service) : super(service) {
     socket.listen((message) => onWebSocketMessage(message));
     socket.done.then((_) => close());
-    service.subscribe('debug', this);
-    service.subscribe('gc', this);
   }
 
   void onWebSocketMessage(message) {
     if (message is String) {
       var map;
       try {
         map = JSON.decode(message);
       } catch (e) {
         socket.close(PARSE_ERROR_CODE, 'Message parse error: $e');
         return;
       }
       if (map is! Map) {
         socket.close(NOT_MAP_ERROR_CODE, 'Message must be a JSON map.');
         return;
       }
       var serial = map['id'];
       onMessage(serial, new Message.fromJsonRpc(map));
     } else {
       socket.close(BINARY_MESSAGE_ERROR_CODE, 'Message must be a string.');
     }
   }
 
-  void post(var serial, dynamic response) {
+  void post(var serial, dynamic result) {
     try {
-      Map map = {
-        'id': serial,
-        'response': response
-      };
-      if (serial == null && response is! String) {
-        socket.add(response);
+      if (serial == null && result is! String) {
+        socket.add(result);
       } else {
+        Map map = {
+          'id': serial,
+          'result': result
+        };
         socket.add(JSON.encode(map));
       }
     } catch (_) {
       print("Ignoring error posting over WebSocket.");
     }
   }
 
   dynamic toJson() {
     Map map = super.toJson();
     map['type'] = 'WebSocketClient';
     map['socket'] = '$socket';
     return map;
   }
 }
 
 
 class HttpRequestClient extends Client {
   static ContentType jsonContentType =
       new ContentType("application", "json", charset: "utf-8");
   final HttpRequest request;
 
-  HttpRequestClient(this.request, service) : super(service);
+  HttpRequestClient(this.request, VMService service)
+      : super(service, sendEvents:false);
 
-  void post(var serial, String response) {
+  void post(var serial, String result) {
     request.response..headers.contentType = jsonContentType
-                    ..write(response)
+                    ..write(result)
                     ..close();
     close();
   }
 
   dynamic toJson() {
     Map map = super.toJson();
     map['type'] = 'HttpRequestClient';
     map['request'] = '$request';
     return map;
   }
@@ skipping 126 matching lines @@
       print('Could not shutdown Observatory HTTP server:\n$e\n$st\n');
       _notifyServerState("", 0);
       return this;
     });
   }
 
 }
 
 void _notifyServerState(String ip, int port)
     native "VMServiceIO_NotifyServerState";