Converted Observatory persistent-hangles-page element

runtime/observatory/lib/src/app/page.dart

 // Copyright (c) 2014, 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;
 
 AllocationProfileRepository _allocationProfileRepository
     = new AllocationProfileRepository();
 ContextRepository _contextRepository = new ContextRepository();
 HeapSnapshotRepository _heapSnapshotRepository
     = new HeapSnapshotRepository();
 ICDataRepository _icdataRepository = new ICDataRepository();
 InboundReferencesRepository _inboundReferencesRepository
     = new InboundReferencesRepository();
 InstanceRepository _instanceRepository = new InstanceRepository();
 IsolateSampleProfileRepository _isolateSampleProfileRepository
     = new IsolateSampleProfileRepository();
+PersistentHandlesRepository _persistentHandlesRepository
+    = new PersistentHandlesRepository();
 PortsRepository _portsRepository = new PortsRepository();
 
 class IsolateNotFound implements Exception {
   String isolateId;
   IsolateNotFound(this.isolateId);
   String toString() => "IsolateNotFound: $isolateId";
 }
 RetainedSizeRepository _retainedSizeRepository = new RetainedSizeRepository();
 ReachableSizeRepository _reachableSizeRepository
     = new ReachableSizeRepository();
@@ skipping 339 matching lines @@
     });
   }
 
   void onInstall() {
     if (element == null) {
       element = container;
     }
   }
 }
 
-class PersistentHandlesPage extends SimplePage {
-  PersistentHandlesPage(app)
-      : super('persistent-handles', 'persistent-handles-page', app);
+class PersistentHandlesPage extends MatchingPage {
+  PersistentHandlesPage(app) : super('persistent-handles', app);
+
+  final DivElement container = new DivElement();
 
   void _visit(Uri uri) {
     super._visit(uri);
     getIsolate(uri).then((isolate) {
-      if (element != null) {
-        PersistentHandlesPageElement page = element;
-        page.isolate = isolate;
-      }
+      container.children = [
+        new PersistentHandlesPageElement(isolate.vm, isolate, app.events,
+                                         app.notifications,
+                                         _persistentHandlesRepository,
+                                         _instanceRepository, queue: app.queue)
+      ];
     });
   }
+
+  void onInstall() {
+    if (element == null) {
+      element = container;
+    }
+  }
 }
 
 class HeapMapPage extends SimplePage {
   HeapMapPage(app) : super('heap-map', 'heap-map', app);
 
   void _visit(Uri uri) {
     super._visit(uri);
     getIsolate(uri).then((isolate) {
       if (element != null) {
         /// Update the page.
@@ skipping 177 matching lines @@
     assert(element != null);
   }
 
   void _visit(Uri uri) {
     assert(element != null);
     assert(canVisit(uri));
   }
 
   bool canVisit(Uri uri) => uri.path == 'timeline';
 }