[ozone/wayland] Implement basic keyboard handling support

ui/ozone/platform/wayland/wayland_connection.h

Index: ui/ozone/platform/wayland/wayland_connection.h
diff --git a/ui/ozone/platform/wayland/wayland_connection.h b/ui/ozone/platform/wayland/wayland_connection.h
index 8f837b586e4b993b7d3a5bdf31a6eca19a2c26ed..c74fd504808cc40a9920726345324d01d4e3de06 100644
--- a/ui/ozone/platform/wayland/wayland_connection.h
+++ b/ui/ozone/platform/wayland/wayland_connection.h
@@ -8,12 +8,18 @@
 #include <map>
 
 #include "base/message_loop/message_pump_libevent.h"
+#include "ui/base/ui_features.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/native_widget_types.h"
+#include "ui/ozone/platform/wayland/wayland_keyboard.h"
 #include "ui/ozone/platform/wayland/wayland_object.h"
 #include "ui/ozone/platform/wayland/wayland_output.h"
 #include "ui/ozone/platform/wayland/wayland_pointer.h"
 
+#if BUILDFLAG(USE_XKBCOMMON)
+#include "ui/events/ozone/layout/xkb/xkb_evdev_codes.h"
+#endif
+
 namespace ui {
 
 class WaylandWindow;
@@ -78,6 +84,7 @@ class WaylandConnection : public PlatformEventSource,
   wl::Object<xdg_shell> shell_;
 
   std::unique_ptr<WaylandPointer> pointer_;
+  std::unique_ptr<WaylandKeyboard> keyboard_;
 
   bool scheduled_flush_ = false;
   bool watching_ = false;
@@ -85,6 +92,10 @@ class WaylandConnection : public PlatformEventSource,
 
   std::vector<std::unique_ptr<WaylandOutput>> output_list_;
 
+#if BUILDFLAG(USE_XKBCOMMON)
+  XkbEvdevCodes codes_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(WaylandConnection);
 };