Move example fn widgets into sky/framework/components

sky/framework/components/floating_action_button.dart

Index: sky/framework/components/floating_action_button.dart
diff --git a/sky/examples/fn/widgets/floating_action_button.dart b/sky/framework/components/floating_action_button.dart
similarity index 75%
rename from sky/examples/fn/widgets/floating_action_button.dart
rename to sky/framework/components/floating_action_button.dart
index ceebc01c2708eb2b11cc8c29cb635d7ee1401977..4fb303dc4a8b8dd11c45e93318387e5d921c51c1 100644
--- a/sky/examples/fn/widgets/floating_action_button.dart
+++ b/sky/framework/components/floating_action_button.dart
@@ -1,6 +1,13 @@
-part of widgets;
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
-class FloatingActionButton extends MaterialComponent {
+import '../fn.dart';
+import 'material.dart';
+import '../theme/colors.dart';
+import '../theme/shadows.dart';
+
+class FloatingActionButton extends Material {
   static final Style _style = new Style('''
     position: absolute;
     bottom: 16px;