mouse-autoselect-window-select

mouse-autoselect-window-select is a compiled Lisp function in `window.el'.

(mouse-autoselect-window-select)

Select window with delayed window autoselection.
If the mouse position has stabilized in a non-selected window, select
that window. The minibuffer window is selected only if the minibuffer
is active. This function is run by `mouse-autoselect-window-timer'.