[inspect][examples] Add expose tree to torus15

Change-Id: Ie969edae971f387a3b8251b1557ccc191b1738a1
diff --git a/public/dart/fuchsia_inspect_flutter/examples/torus15/BUILD.gn b/public/dart/fuchsia_inspect_flutter/examples/torus15/BUILD.gn
index 86b31de..3180bf5 100644
--- a/public/dart/fuchsia_inspect_flutter/examples/torus15/BUILD.gn
+++ b/public/dart/fuchsia_inspect_flutter/examples/torus15/BUILD.gn
@@ -25,6 +25,7 @@
   deps = [
     "//third_party/dart-pkg/git/flutter/packages/flutter",
     "//topaz/public/dart/fuchsia_inspect",
+    "//topaz/public/dart/fuchsia_inspect_flutter",
     "//topaz/public/dart/fuchsia_logger",
     "//topaz/public/dart/fuchsia_modular",
   ]
diff --git a/public/dart/fuchsia_inspect_flutter/examples/torus15/lib/src/handlers/root_intent_handler.dart b/public/dart/fuchsia_inspect_flutter/examples/torus15/lib/src/handlers/root_intent_handler.dart
index 85df53e..1c1cb15 100644
--- a/public/dart/fuchsia_inspect_flutter/examples/torus15/lib/src/handlers/root_intent_handler.dart
+++ b/public/dart/fuchsia_inspect_flutter/examples/torus15/lib/src/handlers/root_intent_handler.dart
@@ -5,6 +5,7 @@
 
 import 'package:flutter/material.dart';
 import 'package:fuchsia_inspect/inspect.dart' as inspect;
+import 'package:fuchsia_inspect_flutter/inspect_flutter.dart';
 import 'package:fuchsia_modular/module.dart' as module;
 
 import '../ui/torus_grid.dart';
@@ -18,5 +19,7 @@
       rows: 4,
       inspectNode: inspectRoot.child('torusTiles'),
     ));
+
+    InspectFlutter.exposeDiagnosticsTree('elementtree');
   }
 }