Make function-ref only show a link for Dart functions

runtime/observatory/lib/src/elements/function_ref.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 function_ref_element;
 
 import 'dart:html';
 import 'package:polymer/polymer.dart';
 import 'package:observatory/service.dart';
 import 'service_ref.dart';
 
 @CustomTag('function-ref')
 class FunctionRefElement extends ServiceRefElement {
   @published bool qualified = true;
 
   FunctionRefElement.created() : super.created();
 
   refChanged(oldValue) {
     super.refChanged(oldValue);
     _updateShadowDom();
   }
 
   ServiceFunction get function => ref;
   void _updateShadowDom() {
     clearShadowRoot();
     if (ref == null) {
       return;
     }
+    if (!function.kind.isDart()) {
+      insertTextSpanIntoShadowRoot(name);
+      return;
+    }
     if (qualified) {
       if (function.dartOwner is ServiceFunction) {
         var functionRef = new Element.tag('function-ref');
         functionRef.ref = function.dartOwner;
         functionRef.qualified = true;
         shadowRoot.children.add(functionRef);
         insertTextSpanIntoShadowRoot('.');
       } else if (function.dartOwner is Class) {
         var classRef = new Element.tag('class-ref');
         classRef.ref = function.dartOwner;
         shadowRoot.children.add(classRef);
         insertTextSpanIntoShadowRoot('.');
       }
     }
     insertLinkIntoShadowRoot(name, url, hoverText);
   }
 }