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

sky/sdk/lib/rendering/README.md

Index: sky/sdk/lib/rendering/README.md
diff --git a/sky/sdk/lib/rendering/README.md b/sky/sdk/lib/rendering/README.md
index 37ad6e2e8913f9ccf6df5b9d90f06f7376ffdc5d..2bb6985531e116659f50430072734eb1633d3f13 100644
--- a/sky/sdk/lib/rendering/README.md
+++ b/sky/sdk/lib/rendering/README.md
@@ -42,9 +42,9 @@ render tree:
    layout without the parent undergoing layout.
 
  * Subclasses of `RenderObject` must implement a `paint` function that draws a
-   visual representation of the object onto an `RenderObjectDisplayList`. If
+   visual representation of the object onto a `RenderCanvas`. If
    the `RenderObject` has children, the `RenderObject` is responsible for
-   painting its children using the `paintChild` function.
+   painting its children using the `paintChild` function on the `RenderCanvas`.
 
  * Subclasses of `RenderObject` must call `adoptChild` whenever they add a
    child. Similarly, they must call `dropChild` whenever they remove a child.