+/* Perform the switch to frame FRAME.
+
+ If FRAME is a switch-frame event `(switch-frame FRAME1)', use
+ FRAME1 as frame.
+
+ If TRACK is non-zero and the frame that currently has the focus
+ redirects its focus to the selected frame, redirect that focused
+ frame's focus to FRAME instead.
+
+ FOR_DELETION non-zero means that the selected frame is being
+ deleted, which includes the possibility that the frame's display
+ is dead. */
+