Build Observatory as part of runtime

runtime/observatory/lib/src/elements/breakpoint_list.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 breakpoint_list_element;
 
 import 'observatory_element.dart';
 import 'package:observatory/service.dart';
 import 'package:polymer/polymer.dart';
 
 // TODO(turnidge): Is a breakpoint list associated with a VM or an isolate?
 @CustomTag('breakpoint-list')
 class BreakpointListElement extends ObservatoryElement {
   @published ServiceMap msg;
 
   BreakpointListElement.created() : super.created();
 
   void refresh(var done) {
     msg.reload().whenComplete(done);
   }
 }