Specs: make sure all layout/paint/hitTest APIs are relative to the right coordinate space

sky/examples/style/toolbar-layout.sky

Index: sky/examples/style/toolbar-layout.sky
diff --git a/sky/examples/style/toolbar-layout.sky b/sky/examples/style/toolbar-layout.sky
index b0f59644bbdaf5adca5a56229a03af82963f8d1c..07843350f9bbdcc7ef23049c08fb5a761098d96c 100644
--- a/sky/examples/style/toolbar-layout.sky
+++ b/sky/examples/style/toolbar-layout.sky
@@ -195,7 +195,8 @@ SKY MODULE
        canvas.save();
        try {
          canvas.beginPath();
-         canvas.rect(child.x, child.y, child.width, child.height);
+         canvas.translate(child.x, child.y);
+         canvas.rect(0, 0, child.width, child.height);
          canvas.clip();
          child.paint(canvas);
        } finally {