Fix bustage from my previous CL: "Color.fromARGB" becomes "new Color.fromARGB".

sky/examples/raw/paint_element_into_displaylist.sky

Index: sky/examples/raw/paint_element_into_displaylist.sky
diff --git a/sky/examples/raw/paint_element_into_displaylist.sky b/sky/examples/raw/paint_element_into_displaylist.sky
index 1196436fb5c200880a76d957c67a48ad63e38463..31a1962d5370c5a759b2ec869d83e37e78491b62 100644
--- a/sky/examples/raw/paint_element_into_displaylist.sky
+++ b/sky/examples/raw/paint_element_into_displaylist.sky
@@ -11,7 +11,7 @@ void main() {
   double width = window.innerWidth.toDouble();
   double height = window.innerHeight.toDouble();
   PictureRecorder recorder = new PictureRecorder(width, height);
-  Paint paint = new Paint()..color = Color.fromARGB(255, 0, 255, 0);
+  Paint paint = new Paint()..color = const Color.fromARGB(255, 0, 255, 0);
   recorder.drawCircle(50.0, 50.0, 50.0, paint);
   recorder.translate(10.0, 10.0);
   root.paint(recorder);