Clean up a bunch of our Dart code.

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

Index: sky/sdk/lib/framework/components2/menu_item.dart
diff --git a/sky/sdk/lib/framework/components2/menu_item.dart b/sky/sdk/lib/framework/components2/menu_item.dart
index e3487edc2ae6ed55976276a47cbd9a9990b5e206..77b42923ee415287ad38b2622173122b0677187b 100644
--- a/sky/sdk/lib/framework/components2/menu_item.dart
+++ b/sky/sdk/lib/framework/components2/menu_item.dart
@@ -9,6 +9,8 @@ import 'ink_well.dart';
 
 class MenuItem extends ButtonBase {
 
+  MenuItem({ Object key, this.icon, this.children, this.onGestureTap }) : super(key: key);
+
   static const BoxDecoration highlightDecoration = const BoxDecoration(
     backgroundColor: const Color.fromARGB(102, 153, 153, 153)
   );
@@ -17,8 +19,6 @@ class MenuItem extends ButtonBase {
   String icon;
   GestureEventListener onGestureTap;
 
-  MenuItem({ Object key, this.icon, this.children, this.onGestureTap }) : super(key: key);
-
   UINode buildContent() {
     return new EventListenerNode(
       new Container(
@@ -46,4 +46,5 @@ class MenuItem extends ButtonBase {
       onGestureTap: onGestureTap
     );
   }
+
 }