Use DOM- rather than Windows-based key code for non-layout cases.

ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h

Index: ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h
diff --git a/ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h b/ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h
index 382a9d3f6f880d1b95c51ac1756307ec8cc09fd1..accf6c8f150f6cca07481e3a799432d35c8ad2f6 100644
--- a/ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h
+++ b/ui/events/ozone/layout/xkb/xkb_keyboard_layout_engine.h
@@ -58,7 +58,8 @@ class EVENTS_OZONE_LAYOUT_EXPORT XkbKeyboardLayoutEngine
 
   // Determines the Windows-based KeyboardCode (VKEY) for a character key,
   // accounting for non-US layouts. May return VKEY_UNKNOWN, in which case the
-  // caller should use |DomCodeToNonLocatedKeyboardCode()| as a last resort.
+  // caller should use, as a last resort,
+  // |LocatedToNonLocatedKeyboardCode(DomCodeToKeyboardCode(dom_code))|.
   KeyboardCode DifficultKeyboardCode(DomCode dom_code,
                                      int ui_flags,
                                      xkb_keycode_t xkb_keycode,