Move service into VM

runtime/bin/vmservice/client.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;
-
-// A service client.
-abstract class Client {
-  /// Port that lives as long as the network client.
-  final RawReceivePort receivePort = new RawReceivePort();
-  final VMService service;
-
-  Client(this.service) {
-    receivePort.handler = (response) {
-      post(null, response);
-    };
-    service._addClient(this);
-  }
-
-  /// When implementing, call [close] when the network connection closes.
-  void close() {
-    receivePort.close();
-    service._removeClient(this);
-  }
-
-  /// Call to process a message. Response will be posted with 'seq'.
-  void onMessage(var seq, Message message) {
-    // Call post when the response arrives.
-    message.response.then((response) {
-      post(seq, response);
-    });
-    // Send message to service.
-    service.route(message);
-  }
-
-  /// When implementing, responsible for sending [response] to the client.
-  void post(var seq, String response);
-
-  dynamic toJson() {
-    return {
-    };
-  }
-}