brought back the effect transform

Author: gaaclarke

impeller/entity/contents/filters/gaussian_blur_filter_contents.cc

@@ -392,7 +392,8 @@ std::optional<Entity> GaussianBlurFilterContents::RenderFilter(
 
   Vector2 entity_scale_x = entity.GetTransform().Basis() * Vector2(1.0, 0.0);
   Vector2 entity_scale_y = entity.GetTransform().Basis() * Vector2(0.0, 1.0);
-  Vector2 scaled_sigma = (Matrix::MakeScale({entity_scale_x.GetLength(),
+  Vector2 scaled_sigma = (effect_transform.Basis() *
+                          Matrix::MakeScale({entity_scale_x.GetLength(),
                                              entity_scale_y.GetLength(), 1.0}) *
                           Vector2(ScaleSigma(sigma_x_), ScaleSigma(sigma_y_)))
                              .Abs();