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

sky/examples/rendering/sector_layout.dart

Index: sky/examples/rendering/sector_layout.dart
diff --git a/sky/examples/rendering/sector_layout.dart b/sky/examples/rendering/sector_layout.dart
index cc7fdb2b50d5a6836fd77dc0fad7691c5443b7cd..3be8cb7d3931164df2845e45a80ebeba4a7cbb11 100644
--- a/sky/examples/rendering/sector_layout.dart
+++ b/sky/examples/rendering/sector_layout.dart
@@ -114,7 +114,7 @@ abstract class RenderDecoratedSector extends RenderSector {
   }
 
   // origin must be set to the center of the circle
-  void paint(RenderObjectDisplayList canvas) {
+  void paint(RenderCanvas canvas) {
     assert(deltaRadius != null);
     assert(deltaTheta != null);
     assert(parentData is SectorParentData);
@@ -251,7 +251,7 @@ class RenderSectorRing extends RenderSectorWithChildren {
 
   // paint origin is 0,0 of our circle
   // each sector then knows how to paint itself at its location
-  void paint(RenderObjectDisplayList canvas) {
+  void paint(RenderCanvas canvas) {
     // TODO(ianh): avoid code duplication
     super.paint(canvas);
     RenderSector child = firstChild;
@@ -356,7 +356,7 @@ class RenderSectorSlice extends RenderSectorWithChildren {
 
   // paint origin is 0,0 of our circle
   // each sector then knows how to paint itself at its location
-  void paint(RenderObjectDisplayList canvas) {
+  void paint(RenderCanvas canvas) {
     // TODO(ianh): avoid code duplication
     super.paint(canvas);
     RenderSector child = firstChild;
@@ -450,7 +450,7 @@ class RenderBoxToRenderSectorAdapter extends RenderBox {
   }
 
   // paint origin is 0,0 of our circle
-  void paint(RenderObjectDisplayList canvas) {
+  void paint(RenderCanvas canvas) {
     super.paint(canvas);
     if (child != null) {
       Rect bounds = new Rect.fromSize(size);