[SVGDom] Fix <ellipse> positioning

experimental/svg/model/SkSVGEllipse.cpp

Index: experimental/svg/model/SkSVGEllipse.cpp
diff --git a/experimental/svg/model/SkSVGEllipse.cpp b/experimental/svg/model/SkSVGEllipse.cpp
index a70a8e019cad3a780c01a538909548e7dde76932..f7461b8cd7fa306f608b5eb9c6657f5d677be9cf 100644
--- a/experimental/svg/model/SkSVGEllipse.cpp
+++ b/experimental/svg/model/SkSVGEllipse.cpp
@@ -63,6 +63,6 @@ void SkSVGEllipse::onDraw(SkCanvas* canvas, const SkSVGLengthContext& lctx,
     const auto ry = lctx.resolve(fRy, SkSVGLengthContext::LengthType::kVertical);
 
     if (rx > 0 && ry > 0) {
-        canvas->drawOval(SkRect::MakeXYWH(cx - rx / 2, cy - ry / 2, rx * 2, ry * 2), paint);
+        canvas->drawOval(SkRect::MakeXYWH(cx - rx, cy - ry, rx * 2, ry * 2), paint);
     }
 }