Add persistent handles to service protocol and Observatory UI

runtime/observatory/lib/src/app/application.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.
 
 part of app;
 
 class Notification {
   Notification.fromEvent(this.event);
   Notification.fromException(this.exception, this.stacktrace);
 
@@ skipping 121 matching lines @@
     _pageRegistry.add(new DebuggerPage(this));
     _pageRegistry.add(new CpuProfilerPage(this));
     _pageRegistry.add(new TableCpuProfilerPage(this));
     _pageRegistry.add(new AllocationProfilerPage(this));
     _pageRegistry.add(new HeapMapPage(this));
     _pageRegistry.add(new HeapSnapshotPage(this));
     _pageRegistry.add(new VMConnectPage(this));
     _pageRegistry.add(new IsolateReconnectPage(this));
     _pageRegistry.add(new ErrorViewPage(this));
     _pageRegistry.add(new MetricsPage(this));
+    _pageRegistry.add(new PersistentHandlesPage(this));
     _pageRegistry.add(new PortsPage(this));
     _pageRegistry.add(new LoggingPage(this));
     _pageRegistry.add(new TimelinePage(this));
     // Note that ErrorPage must be the last entry in the list as it is
     // the catch all.
     _pageRegistry.add(new ErrorPage(this));
   }
 
   void _visit(Uri uri, Map internalArguments) {
     if (internalArguments['trace'] != null) {
@@ skipping 81 matching lines @@
     }
 
     // TODO(turnidge): Report this failure via analytics.
     Logger.root.warning('Caught exception: ${e}\n${st}');
     notifications.add(new Notification.fromException(e, st));
   }
 
   // This map keeps track of which curly-blocks have been expanded by the user.
   Map<String,bool> expansions = {};
 }