Converted Observatory heap-snapshot 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();
+HeapSnapshotRepository _heapSnapshotRepository
+    = new HeapSnapshotRepository();
 InstanceRepository _instanceRepository = new InstanceRepository();
 IsolateSampleProfileRepository _isolateSampleProfileRepository
     = new IsolateSampleProfileRepository();
 PortsRepository _portsRepository = new PortsRepository();
 
 class IsolateNotFound implements Exception {
   String isolateId;
   IsolateNotFound(this.isolateId);
   String toString() => "IsolateNotFound: $isolateId";
 }
@@ skipping 330 matching lines @@
     getIsolate(uri).then((isolate) {
       if (element != null) {
         /// Update the page.
         HeapMapElement page = element;
         page.isolate = isolate;
       }
     });
   }
 }
 
-class HeapSnapshotPage extends SimplePage {
-  HeapSnapshotPage(app) : super('heap-snapshot', 'heap-snapshot', app);
+class HeapSnapshotPage extends MatchingPage {
+  HeapSnapshotPage(app) : super('heap-snapshot', app);
+
+  DivElement container = new DivElement();
 
   void _visit(Uri uri) {
     super._visit(uri);
     getIsolate(uri).then((isolate) {
-      if (element != null) {
-        /// Update the page.
-        HeapSnapshotElement page = element;
-        page.isolate = isolate;
-      }
+      container.children = [
+        new HeapSnapshotElement(isolate.vm, isolate, app.events,
+                                app.notifications, _heapSnapshotRepository,
+                                _instanceRepository, queue: app.queue)
+      ];
     });
   }
+
+  void onInstall() {
+    if (element == null) {
+      element = container;
+    }
+  }
 }
 
 
 class LoggingPage extends SimplePage {
   LoggingPage(app) : super('logging', 'logging-page', app);
 
   void _visit(Uri uri) {
     super._visit(uri);
     getIsolate(uri).then((isolate) {
       if (element != null) {
@@ skipping 139 matching lines @@
     assert(element != null);
   }
 
   void _visit(Uri uri) {
     assert(element != null);
     assert(canVisit(uri));
   }
 
   bool canVisit(Uri uri) => uri.path == 'timeline';
 }