When attempting to navigate to a page for an isolate that doesn't exist, offer to

runtime/observatory/lib/src/elements/cpu_profile.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 cpu_profile_element;
 
 import 'dart:async';
 import 'dart:html';
 import 'observatory_element.dart';
 import 'package:observatory/service.dart';
@@ skipping 951 matching lines @@
     tableBody.children[focusedRow].classes.add('focused');
     _updateFunctionTreeView();
     _buildCallersTable(focusedFunction);
     _buildCalleesTable(focusedFunction);
   }
 
   _onRowClick(TableRowElement tr) {
     var tableBody = $['profile-table'];
     var row = profileTable.rowFromIndex(tableBody.children.indexOf(tr));
     var function = row.values[NameSortedTable.FUNCTION_COLUMN];
-    app.locationManager.goParameter(
+    app.locationManager.goReplacingParameters(
         {
           'functionId': function.id
         }
     );
   }
 
   _renderTable() {
     profileTable._updateTableView($['profile-table'],
                                   profileTable._makeFunctionRow,
                                   _onRowClick,
@@ skipping 134 matching lines @@
     }
     var filter = (FunctionCallTreeNode node) {
       return node.profileFunction.function == focusedFunction;
     };
     tree = tree.filtered(filter);
     var rootRow =
         new FunctionProfileTreeRow(functionTree, null, profile, tree.root);
     functionTree.initialize(rootRow);
   }
 }