Whether an active maximize button rectangle is registered.
Scale applied to the rectangle, the page's devicePixelRatio: the window's DPI divided by 96, times the Windows text size and the page zoom.
Whether the system provides Windows 11 Snap layouts. When false, the host never reports this area as the maximize button. When true, avoid using HTML title tooltips on the button as they obstruct the Snap flyout; use aria-label instead.
Always true here; a failed call resolves with ApiFailure instead.
Successful response from
window.setMaximizeButtonRegion.