Chrome Linux DRT nativeKeyCode helper

ui/base/keycodes/keyboard_code_conversion_gtk.cc

 // Copyright (c) 2011 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.
 
 /*
  * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2006 Michael Emmel mike.emmel@gmail.com
  * Copyright (C) 2007 Holger Hans Peter Freyther
  * Copyright (C) 2008 Collabora, Ltd.  All rights reserved.
  * Copyright (C) 2008, 2009 Google Inc.
@@ skipping 603 matching lines @@
     case VKEY_F22:
     case VKEY_F23:
     case VKEY_F24:
       return GDK_F1 + (keycode - VKEY_F1);
 
     default:
       return 0;
     }
 }
 
+int GdkNativeKeyCodeForWindowsKeyCode(KeyboardCode keycode, bool shift) {
+  int keyval = GdkKeyCodeForWindowsKeyCode(keycode, shift);
+  GdkKeymapKey* keys;
+  gint n_keys;
+  if (keyval && gdk_keymap_get_entries_for_keyval(0, keyval, &keys, &n_keys))
+    return keys[0].keycode;
+  return 0;
+}
+
 KeyboardCode KeyboardCodeFromGdkEventKey(GdkEventKey* event) {
   KeyboardCode keycode = WindowsKeyCodeForGdkKeyCode(event->keyval);
 #ifdef USE_X11
   // Gtk's key values are same as X11's keysyms.
   if (keycode == VKEY_UNKNOWN) {
     unsigned int keyval =
         DefaultXKeysymFromHardwareKeycode(event->hardware_keycode);
     keycode = WindowsKeyCodeForGdkKeyCode(keyval);
   }
 #endif
   return keycode;
 }
 
 }  // namespace ui