Build Observatory as part of runtime

runtime/bin/vmservice/observatory/lib/src/elements/instance_view.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 instance_view_element;
-
-import 'dart:async';
-import 'observatory_element.dart';
-import 'package:observatory/service.dart';
-import 'package:polymer/polymer.dart';
-
-@CustomTag('instance-view')
-class InstanceViewElement extends ObservatoryElement {
-  @published Instance instance;
-
-  InstanceViewElement.created() : super.created();
-
-  Future<ServiceObject> eval(String text) {
-    return instance.isolate.get(
-        instance.id + "/eval?expr=${Uri.encodeComponent(text)}");
-  }
-
-  void refresh(Function onDone) {
-    instance.reload().whenComplete(onDone);
-  }
-}