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80ff62e2be
AccessKit asks for focus by node id, and `Focus::interested_in_focus` only picks the request up once the widget itself runs. Everything that reads the focus before the widget — styling it, for one — therefore saw the old focus, so a text edit was styled unfocused in the very pass it got focused, and lost its focus ring for a frame. AccessKit names the widget by the node id it read from the last tree we sent, so the widget has been here before and is in `focus_widgets_cache`: `begin_pass` can hand out the focus right away, the same way a `request_focus` from the last pass is handed out. Memory then holds the focus before any widget runs, and `Ui::widget_style` needs to know nothing about focus at all. For the same reason the request never has to outlive the pass it arrives in — a widget that has not run yet cannot have been named by it — so the pending `id_requested_by_accesskit` field becomes a local. The four `text_edit_*` snapshots gain a caret along with the ring, because the field is now focused for real in that pass rather than a pass later. Also drops `fallback_gap` from `TextEdit`, which has no `gap` of its own to defer to, and moves the `DragValue` `HasClasses` impl above its test module.