Refactor fn2.dart, since it breached our 1000-line threshold.

sky/sdk/lib/framework/components2/icon_button.dart

Index: sky/sdk/lib/framework/components2/icon_button.dart
diff --git a/sky/sdk/lib/framework/components2/icon_button.dart b/sky/sdk/lib/framework/components2/icon_button.dart
deleted file mode 100644
index d404be632cea8b016a2344aaaebc74ddca73036b..0000000000000000000000000000000000000000
--- a/sky/sdk/lib/framework/components2/icon_button.dart
+++ /dev/null
@@ -1,25 +0,0 @@
-// 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.
-
-import '../fn2.dart';
-import '../rendering/box.dart';
-import 'icon.dart';
-
-class IconButton extends Component {
-
-  IconButton({ String icon: '', this.onGestureTap })
-    : super(key: icon), icon = icon;
-
-  final String icon;
-  final GestureEventListener onGestureTap;
-
-  UINode build() {
-    return new EventListenerNode(
-      new Padding(
-        child: new Icon(type: icon, size: 24),
-        padding: const EdgeDims.all(8.0)),
-      onGestureTap: onGestureTap);
-  }
-
-}