Remove X11 deps from //ui/events:events_base.

ui/events/keycodes/keyboard_code_conversion_xkb.h

Index: ui/events/keycodes/keyboard_code_conversion_xkb.h
diff --git a/ui/events/keycodes/keyboard_code_conversion_xkb.h b/ui/events/keycodes/keyboard_code_conversion_xkb.h
index 86e82f4ad59a817a2c9a4caffb85c6ee54cf6f33..a1f9b78704fb7f00b0929c8dbef48f93740cbc01 100644
--- a/ui/events/keycodes/keyboard_code_conversion_xkb.h
+++ b/ui/events/keycodes/keyboard_code_conversion_xkb.h
@@ -8,7 +8,6 @@
 // These functions are used by X11 targets and by Ozone/XKBcommon targets.
 
 #include "base/strings/string16.h"
-#include "ui/events/events_base_export.h"
 #include "ui/events/keycodes/dom/dom_key.h"
 #include "ui/events/keycodes/xkb_keysym.h"
 
@@ -17,7 +16,7 @@ namespace ui {
 // Returns the DomKey associated with a non-character xkb_keysym_t.
 // Returns DomKey::NONE for unrecognized keysyms, which includes
 // all printable characters.
-EVENTS_BASE_EXPORT DomKey NonPrintableXKeySymToDomKey(xkb_keysym_t keysym);
+DomKey NonPrintableXKeySymToDomKey(xkb_keysym_t keysym);
 
 // TODO(kpschoedel) crbug.com/442757
 // Returns the dead key combining character associated with an xkb_keysym_t,
@@ -25,8 +24,7 @@ EVENTS_BASE_EXPORT DomKey NonPrintableXKeySymToDomKey(xkb_keysym_t keysym);
 // base::char16 DeadXKeySymToCombiningCharacter(xkb_keysym_t keysym);
 
 // Return the DomKey determined by the XKB layout result (keysym, character).
-EVENTS_BASE_EXPORT DomKey
-XKeySymToDomKey(xkb_keysym_t keysym, base::char16 character);
+DomKey XKeySymToDomKey(xkb_keysym_t keysym, base::char16 character);
 
 }  // namespace ui