Focusing algorithm is missing a "scroll the element into view" step

(This is an intentional duplicate of https://www.w3.org/Bugs/Public/show_bug.cgi?id=27913 since that bug is in the wrong WG and an obscure Bugzilla Component.)
Basically, https://html.spec.whatwg.org/multipage/interaction.html#focus-update-steps doesn't seem to mention anything about scrolling the focused element into view if it was outside the viewport, even though all browsers do this in practice (simple testcase) most of the time (there are apparently some exceptional cases). So a step (presumably invoking https://drafts.csswg.org/cssom-view/#scroll-an-element-into-view) should be added to make the spec reflect reality. I haven't dug deep enough to suggest exactly where in that algorithm the new step should be inserted.