XKB implementation of Ozone key layout.

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

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_EVENTS_OZONE_LAYOUT_XKB_SCOPED_XKB_H_
+#define UI_EVENTS_OZONE_LAYOUT_XKB_SCOPED_XKB_H_
+
+#include <xkbcommon/xkbcommon.h>
+
+namespace ui {
+
+// libxkbcommon uses explicit reference counting for its structures,
+// so we need to trigger its cleanup.
+struct XkbContextDeleter {
+  void operator()(xkb_context* context) { xkb_context_unref(context); }
+};
+
+struct XkbStateDeleter {
+  void operator()(xkb_state* state) { xkb_state_unref(state); }
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_OZONE_LAYOUT_XKB_SCOPED_XKB_H_