Stubbed `.viewport_dpr_based_max_logical_width()`.
Stubbed `.viewport_dpr_based_max_logical_width()`.

alanwsmith/doc-write-image-loader,alanwsmith/doc-write-image-loader,alanwsmith/doc-write-image-loader,alanwsmith/document.write-image-loader,alanwsmith/document.write-image-loader