Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/ozone/evdev/keyboard_util_evdev.cc

Index: ui/events/ozone/evdev/keyboard_util_evdev.cc
diff --git a/ui/events/ozone/evdev/keyboard_util_evdev.cc b/ui/events/ozone/evdev/keyboard_util_evdev.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7755a6fe955b330430617d58c992c94644e9dd3f
--- /dev/null
+++ b/ui/events/ozone/evdev/keyboard_util_evdev.cc
@@ -0,0 +1,33 @@
+// Copyright 2015 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.
+
+#include "ui/events/ozone/evdev/keyboard_util_evdev.h"
+
+#include <linux/input.h>
+
+#include "ui/events/keycodes/dom/keycode_converter.h"
+
+namespace ui {
+
+namespace {
+
+const int kXkbKeycodeOffset = 8;
+
+}  // namespace
+
+int NativeCodeToEvdevCode(int native_code) {
+  if (native_code == KeycodeConverter::InvalidNativeKeycode())
+    return KEY_RESERVED;
+
+  return native_code - kXkbKeycodeOffset;
+}
+
+int EvdevCodeToNativeCode(int evdev_code) {
+  if (evdev_code == KEY_RESERVED)
+    return KeycodeConverter::InvalidNativeKeycode();
+
+  return evdev_code + kXkbKeycodeOffset;
+}
+
+}  // namespace ui