Decouple Canvas from DisplayList and map Picture and PictureRecorder more directly to their Skia co…

sky/examples/raw/launcher.dart

Index: sky/examples/raw/launcher.dart
diff --git a/sky/examples/raw/launcher.dart b/sky/examples/raw/launcher.dart
index 58341d184b1df9dd89a323f0fe5ac3ab460c972e..92d10480c79374733f91ae6b4973a6d409fdb2bd 100644
--- a/sky/examples/raw/launcher.dart
+++ b/sky/examples/raw/launcher.dart
@@ -6,17 +6,19 @@ import "dart:math";
 import 'dart:sky';
 
 import 'package:sky/framework/shell.dart' as shell;
+import 'package:sky/rendering/object.dart';
 import 'package:mojom/intents/intents.mojom.dart';
 
 Picture draw(int a, int r, int g, int b) {
   double width = view.width;
   double height = view.height;
 
-  PictureRecorder recorder = new PictureRecorder(width, height);
+  PictureRecorder recorder = new PictureRecorder();
+  RenderCanvas canvas = new RenderCanvas(recorder, width, height);

[abarth-chromium, 2015/06/23 02:28:45]

Again, regular Canvas is fine here.  There's no need to add a dependency on
package:sky/rendering.

[iansf, 2015/06/23 22:46:09]

Done.

   double radius = min(width, height) * 0.45;
 
   Paint paint = new Paint()..color = new Color.fromARGB(a, r, g, b);
-  recorder.drawRect(new Rect.fromSize(new Size(width, height)), paint);
+  canvas.drawRect(new Rect.fromSize(new Size(width, height)), paint);
   return recorder.endRecording();
 }