Make the object store visible in Observatory.

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;
 
 class IsolateNotFound implements Exception {
   String isolateId;
   IsolateNotFound(this.isolateId);
   String toString() => "IsolateNotFound: $isolateId";
@@ skipping 181 matching lines @@
     getIsolate(uri).then((isolate) {
       if (element != null) {
         /// Update the page.
         DebuggerPageElement page = element;
         page.isolate = isolate;
       }
     });
   }
 }
 
+
+class ObjectStorePage extends SimplePage {
+  ObjectStorePage(app) : super('object-store', 'objectstore-view', app);
+
+  void _visit(Uri uri) {
+    super._visit(uri);
+    getIsolate(uri).then((isolate) {
+      isolate.getObjectStore().then((objectStore) {
+        if (element != null) {
+          /// Update the page.
+          ObjectStoreView page = element;
+          page.objectStore = objectStore;
+        }
+      });
+    });
+  }
+}
+
 class CpuProfilerPage extends SimplePage {
   CpuProfilerPage(app) : super('profiler', 'cpu-profile', app);
 
   void _visit(Uri uri) {
     super._visit(uri);
     getIsolate(uri).then((isolate) {
       if (element != null) {
         /// Update the page.
         CpuProfileElement page = element;
         page.isolate = isolate;
@@ skipping 241 matching lines @@
     assert(element != null);
   }
 
   void _visit(Uri uri) {
     assert(element != null);
     assert(canVisit(uri));
   }
 
   bool canVisit(Uri uri) => uri.path == 'timeline';
 }