Format all dart dev compiler files

pkg/dev_compiler/test/codegen/sunflower/sunflower.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library sunflower;
 
 import 'dart:html';
 import 'dart:math';
 
 import 'circle.dart';
@@ skipping 29 matching lines @@
     final x = centerX + r * cos(theta);
     final y = centerY - r * sin(theta);
     new SunflowerSeed(x, y, SEED_RADIUS).draw(context);
   }
   notes.text = "$seeds seeds";
 }
 
 // This example was modified to use classes and mixins.
 class SunflowerSeed extends Circle with CirclePainter {
   SunflowerSeed(num x, num y, num radius, [String color])
-  : super(x, y, radius) {
+      : super(x, y, radius) {
     if (color != null) this.color = color;
   }
 }