Roll Dart forward and use the shared vmservice isolate sources + benchmark fixes

mojo/dart/embedder/vmservice/main.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 dart_controller_service_isolate;
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-import 'dart:isolate';
-import 'dart:_vmservice';
-
-part 'loader.dart';
-part 'server.dart';
-
-// The TCP ip/port that the HTTP server listens on.
-int _port;
-String _ip;
-// Should the HTTP server auto start?
-bool _autoStart;
-
-// HTTP server.
-Server server;
-Map<String, Asset> _assets;
-Map<String, Asset> get assets {
-  if (_assets == null) {
-    try {
-      _assets = Asset.request();
-    } catch (e) {
-      print('Could not load Observatory assets: $e');
-    }
-  }
-  return _assets;
-}
-
-_onShutdown() {
-  if (server != null) {
-    server.close(true).catchError((e, st) {
-      print(e);
-    }).whenComplete(_shutdown);
-  } else {
-    _shutdown();
-  }
-}
-
-void _bootServer() {
-  // Lazily create service.
-  var service = new VMService();
-  service.onShutdown = _onShutdown;
-  // Lazily create server.
-  server = new Server(service, _ip, _port);
-}
-
-main() {
-  if (_autoStart) {
-    _bootServer();
-    if (server != null) {
-      server.startup();
-    }
-    // It's just here to push an event on the event loop so that we invoke the
-    // scheduled microtasks.
-    Timer.run(() {});
-  }
-  scriptLoadPort.handler = _processLoadRequest;
-  return scriptLoadPort;
-}
-
-_shutdown() native "ServiceIsolate_Shutdown";