Create a ServiceObject for a socket

runtime/bin/vmservice/client/lib/src/elements/code_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 code_view_element;
 
 import 'dart:html';
 import 'observatory_element.dart';
 import 'package:observatory/service.dart';
 import 'package:polymer/polymer.dart';
@@ skipping 10 matching lines @@
     }
     code.load().then((Code c) {
       c.loadScript();
     });
   }
 
   void refresh(var done) {
     code.reload().whenComplete(done);
   }
 
-  Element _findJumpTarget(Node target) {
+  Element _findJumpTarget(Element target) {
     var jumpTarget = target.attributes['data-jump-target'];
     if (jumpTarget == '') {
       return null;
     }
     var address = int.parse(jumpTarget);
     var node = shadowRoot.querySelector('#addr-$address');
     if (node == null) {
       return null;
     }
     return node;
   }
 
   void mouseOver(Event e, var detail, Node target) {
     var jt = _findJumpTarget(target);
     if (jt == null) {
       return;
     }
     jt.classes.add('highlight');
   }
 
   void mouseOut(Event e, var detail, Node target) {
     var jt = _findJumpTarget(target);
     if (jt == null) {
       return;
     }
     jt.classes.remove('highlight');
   }
 }