Converted Observatory heap-map 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
@@ skipping 381 matching lines @@
     super._visit(uri);
     getIsolate(uri).then((isolate) {
       if (element != null) {
         PersistentHandlesPageElement page = element;
         page.isolate = isolate;
       }
     });
   }
 }
 
-class HeapMapPage extends SimplePage {
-  HeapMapPage(app) : super('heap-map', 'heap-map', app);
+class HeapMapPage extends MatchingPage {
+  HeapMapPage(app) : super('heap-map', app);
+
+  final DivElement container = new DivElement();
 
   void _visit(Uri uri) {
     super._visit(uri);
     getIsolate(uri).then((isolate) {
-      if (element != null) {
-        /// Update the page.
-        HeapMapElement page = element;
-        page.isolate = isolate;
-      }
+      container.children = [
+        new HeapMapElement(isolate.vm, isolate, app.events, app.notifications,
+                           queue: app.queue)
+      ];
     });
   }
+
+  void onInstall() {
+    if (element == null) {
+      element = container;
+    }
+  }
 }
 
 class HeapSnapshotPage extends MatchingPage {
   HeapSnapshotPage(app) : super('heap-snapshot', app);
 
   final DivElement container = new DivElement();
 
   void _visit(Uri uri) {
     super._visit(uri);
     getIsolate(uri).then((isolate) {
@@ skipping 162 matching lines @@
     assert(element != null);
   }
 
   void _visit(Uri uri) {
     assert(element != null);
     assert(canVisit(uri));
   }
 
   bool canVisit(Uri uri) => uri.path == 'timeline';
 }