Begin migrating the vm service from a rest-style interface to a json-rpc style interface.

runtime/bin/vmservice/vmservice_dartium.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.
-
-library vmservice_dartium;
-
-import 'dart:isolate';
-import 'vmservice.dart';
-
-// The receive port that isolate startup / shutdown messages are delivered on.
-RawReceivePort _receivePort;
-// The receive port that service request messages are delivered on.
-RawReceivePort _requestPort;
-
-// The native method that is called to post the response back to DevTools.
-void postResponse(String response, int cookie) native "VMService_PostResponse";
-
-/// Dartium recieves messages through the _requestPort and posts
-/// responses via postResponse. It has a single persistent client.
-class DartiumClient extends Client {
-  DartiumClient(port, service) : super(service) {
-    port.handler = ((message) {
-      if (message == null) {
-        return;
-      }
-      if (message is! List) {
-        return;
-      }
-      if (message.length != 2) {
-        return;
-      }
-      if (message[0] is! String) {
-        return;
-      }
-      var uri = Uri.parse(message[0]);
-      var cookie = message[1];
-      onMessage(cookie, new Message.fromUri(uri));
-    });
-  }
-
-  void post(var seq, String response) {
-    postResponse(response, seq);
-  }
-
-  dynamic toJson() {
-    var map = super.toJson();
-    map['type'] = 'DartiumClient';
-  }
-}
-
-
-main() {
-  // Create VmService.
-  var service = new VMService();
-  _receivePort = service.receivePort;
-  _requestPort = new RawReceivePort();
-  new DartiumClient(_requestPort, service);
-}