Split Size into Size and Offset.

sky/sdk/lib/example/raw/baseline.dart

Index: sky/sdk/lib/example/raw/baseline.dart
diff --git a/sky/sdk/lib/example/raw/baseline.dart b/sky/sdk/lib/example/raw/baseline.dart
index cbf67ecf6766e5eec6ffb380e78f657dedbc5dd9..f848985d2fe4159413d1a4b1d4afde5412a6d362 100644
--- a/sky/sdk/lib/example/raw/baseline.dart
+++ b/sky/sdk/lib/example/raw/baseline.dart
@@ -47,7 +47,7 @@ void drawText(sky.Canvas canvas, String lh) {
 void main() {
   // prepare the rendering
   sky.PictureRecorder recorder = new sky.PictureRecorder();
-  sky.Canvas canvas = new sky.Canvas(recorder, sky.view.width, sky.view.height);
+  sky.Canvas canvas = new sky.Canvas(recorder, new sky.Size(sky.view.width, sky.view.height));
 
   // background
   sky.Paint paint = new sky.Paint();