Add Socket ref to HttpServer.

sdk/lib/io/http_impl.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 dart.io;
 
 const int _OUTGOING_BUFFER_SIZE = 8 * 1024;
 
 class _HttpIncoming extends Stream<List<int>> {
   final int _transferLength;
@@ skipping 2023 matching lines @@
 }
 
 
 // HTTP server waiting for socket connections.
 class _HttpServer
     extends Stream<HttpRequest> with _ServiceObject
     implements HttpServer {
   // Use default Map so we keep order.
   static Map<int, _HttpServer> _servers = new Map<int, _HttpServer>();
 
-  final String _serviceTypePath = 'io/http/servers';
-  final String _serviceTypeName = 'HttpServer';
-
   String serverHeader;
 
   Duration _idleTimeout;
   Timer _idleTimer;
 
   static Future<HttpServer> bind(address, int port, int backlog) {
     return ServerSocket.bind(address, port, backlog: backlog).then((socket) {
       return new _HttpServer._(socket, true);
     });
   }
@@ skipping 162 matching lines @@
         result.closing++;
       }
     });
     _idleConnections.forEach((_HttpConnection conn) {
       result.idle++;
       assert(conn._isIdle);
     });
     return result;
   }
 
+  String get _serviceTypePath => 'io/http/servers';
+  String get _serviceTypeName => 'HttpServer';
+
   Map _toJSON(bool ref) {
     var r = {
       'id': _servicePath,
       'type': _serviceType(ref),
       'name': '${address.host}:$port',
       'user_name': '${address.host}:$port',
     };
     if (ref) {
       return r;
     }
+    try {
+      r['socket'] = _serverSocket._toJSON(true);
+    } catch (_) {
+      r['socket'] = {
+        'id': _servicePath,
+        'type': '@Socket',
+        'name': 'UserSocket',
+        'user_name': 'UserSocket',
+      };
+    }
     r['port'] = port;
     r['address'] = address.host;
     r['active'] = _activeConnections.length;
     r['idle'] = _idleConnections.length;
     r['closed'] = closed;
     return r;
   }
 
   _HttpSessionManager _sessionManagerInstance;
 
@@ skipping 416 matching lines @@
   const _RedirectInfo(this.statusCode, this.method, this.location);
 }
 
 String _getHttpVersion() {
   var version = Platform.version;
   // Only include major and minor version numbers.
   int index = version.indexOf('.', version.indexOf('.') + 1);
   version = version.substring(0, index);
   return 'Dart/$version (dart:io)';
 }