Re-lands 58186:

app/keyboard_code_conversion_win.h

Index: app/keyboard_code_conversion_win.h
diff --git a/app/keyboard_code_conversion_win.h b/app/keyboard_code_conversion_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..eaf3105d6008be5e1ee91ea997fd21c9e819f1f6
--- /dev/null
+++ b/app/keyboard_code_conversion_win.h
@@ -0,0 +1,19 @@
+// Copyright (c) 2010 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 APP_KEYBOARD_CODE_CONVERSION_WIN_H_
+#define APP_KEYBOARD_CODE_CONVERSION_WIN_H_
+#pragma once
+
+#include "app/keyboard_codes.h"
+
+namespace app {
+
+// Methods to convert app::KeyboardCode/Windows virtual key type methods.
+WORD WindowsKeyCodeForKeyboardCode(app::KeyboardCode keycode);
+app::KeyboardCode KeyboardCodeForWindowsKeyCode(WORD keycode);
+
+}  // namespace app
+
+#endif  // APP_KEYBOARD_CODE_CONVERSION_WIN_H_