Function webrender::border::get_max_scale_for_border

pub fn get_max_scale_for_border(
    border_data: &NormalBorderData
) -> LayoutToDeviceScale

Computes the maximum scale that we allow for this set of border parameters. capping the scale will result in rendering very large corners at a lower resolution and stretching them, so they will have the right shape, but blurrier.