Rearrange AppView so that the constructor is first.

sky/sdk/lib/framework/app.dart

 // 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 'layout2.dart';
 import 'dart:sky' as sky;
 
 class AppView {
+
+  AppView(RenderBox root) {
+    sky.view.setEventCallback(_handleEvent);
+    sky.view.setBeginFrameCallback(_beginFrame);
+
+    _renderView = new RenderView(root: root);
+    _renderView.layout(newWidth: sky.view.width, newHeight: sky.view.height);
+  
+    sky.view.scheduleFrame();
+  }
+
   RenderView _renderView;
 
   void _beginFrame(double timeStamp) {
     RenderNode.flushLayout();
     _renderView.paintFrame();
   }
 
   void _handleEvent(sky.Event event) {
     if (event is! sky.PointerEvent)
       return;
     HitTestResult result = new HitTestResult();
     _renderView.hitTest(result, x: event.x, y: event.y);
     result.path.reversed.forEach((RenderNode node) {
       node.handlePointer(event);
     });
   }
 
-  AppView(RenderBox root) {
-    sky.view.setEventCallback(_handleEvent);
-    sky.view.setBeginFrameCallback(_beginFrame);
-
-    _renderView = new RenderView(root: root);
-    _renderView.layout(newWidth: sky.view.width, newHeight: sky.view.height);
-  
-    sky.view.scheduleFrame();
-  }
 }