Create an example app that demonstrates interactive coordination of an fn tree and a raw RenderObje…

sky/tests/raw/sector_layout.dart

Index: sky/tests/raw/sector_layout.dart
diff --git a/sky/examples/widgets/hello_widgets.dart b/sky/tests/raw/sector_layout.dart
similarity index 51%
copy from sky/examples/widgets/hello_widgets.dart
copy to sky/tests/raw/sector_layout.dart
index 59b6a230d14529672c87a85a0aef755e75a820ea..e3abc94e4a8c4a81f47b678b22179a9c8c712dd6 100644
--- a/sky/examples/widgets/hello_widgets.dart
+++ b/sky/tests/raw/sector_layout.dart
@@ -2,14 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'package:sky/widgets/basic.dart';
+import 'dart:async';
 
-class HelloWorldApp extends App {
-  UINode build() {
-    return new Text('Hello, fn2!');
-  }
-}
+import '../../examples/rendering/sector_layout.dart';
+import '../resources/display_list.dart';
 
 void main() {
-  new HelloWorldApp();
+  new TestRenderView(buildSectorExample()).endTest();
 }