Add isolate tag-profile and better handling of errors

runtime/bin/vmservice/client/lib/src/elements/service_error_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 vm_view_element;
+library service_error_view_element;
 
-import 'dart:async';
 import 'observatory_element.dart';
+import 'package:polymer/polymer.dart';
 import 'package:observatory/service.dart';
-import 'package:polymer/polymer.dart';
 
-@CustomTag('vm-view')
-class VMViewElement extends ObservatoryElement {
-  @published VM vm;
+/// Displays a ServiceError
+@CustomTag('service-error-view')
+class ServiceErrorViewElement extends ObservatoryElement {
   @published ServiceError error;
 
-  VMViewElement.created() : super.created();
-
-  void refresh(var done) {
-    vm.reload().whenComplete(done);
-  }
+  ServiceErrorViewElement.created() : super.created();
 }