For layers that contain only unscaled bitmap content (like a canvas or image), then we don't need to allocate a device pixel ratio scaled backing store, since it's pointlessly upscaling. <rdar://89515405>
Pull request: https://github.com/WebKit/WebKit/pull/1405
Committed r295718 (251723@main): <https://commits.webkit.org/251723@main> Reviewed commits have been landed. Closing PR #1405 and removing active labels.
*** Bug 242847 has been marked as a duplicate of this bug. ***