Remove redundant Paint.setARGB in favor of assigning to Paint.color.

sky/examples/raw/spinning_image.dart

Index: sky/examples/raw/spinning_image.dart
diff --git a/sky/examples/raw/spinning_image.dart b/sky/examples/raw/spinning_image.dart
index cdbf7f678209f1c147e0d3dc59c507a901876a59..87ca8be6141b2023027b0ff91a3d328a6b27bbb3 100644
--- a/sky/examples/raw/spinning_image.dart
+++ b/sky/examples/raw/spinning_image.dart
@@ -19,7 +19,7 @@ void beginFrame(double timeStamp) {
   canvas.translate(view.width / 2.0, view.height / 2.0);
   canvas.rotate(math.PI * delta / 1800);
   canvas.scale(0.2, 0.2);
-  Paint paint = new Paint()..setARGB(255, 0, 255, 0);
+  Paint paint = new Paint()..color = Color.fromARGB(255, 0, 255, 0);
   if (image != null)
     canvas.drawImage(image, -image.width / 2.0, -image.height / 2.0, paint);
   view.picture = canvas.endRecording();