Implement UI automation on the Mac....

base/keyboard_codes_win.h

 // Copyright (c) 2009 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 BASE_KEYBOARD_CODES_WIN_H_
 #define BASE_KEYBOARD_CODES_WIN_H_
 
 #include <windows.h>
 
 namespace base {
 
 typedef enum {
   VKEY_BACK = VK_BACK,
   VKEY_TAB = VK_TAB,
   VKEY_CLEAR = VK_CLEAR,
   VKEY_RETURN = VK_RETURN,
   VKEY_SHIFT = VK_SHIFT,
   VKEY_CONTROL = VK_CONTROL,
-  VKEY_MENU = VK_MENU,
+  VKEY_MENU = VK_MENU,  // a.k.a. ALT
+  VKEY_COMMAND = 0,     // Not meaningful for Windows.  START, perhaps?
   VKEY_PAUSE = VK_PAUSE,
   VKEY_CAPITAL = VK_CAPITAL,
   VKEY_KANA = VK_KANA,
   VKEY_HANGUL = VK_HANGUL,
   VKEY_JUNJA = VK_JUNJA,
   VKEY_FINAL = VK_FINAL,
   VKEY_HANJA = VK_HANJA,
   VKEY_KANJI = VK_KANJI,
   VKEY_ESCAPE = VK_ESCAPE,
   VKEY_CONVERT = VK_CONVERT,
@@ skipping 145 matching lines @@
   VKEY_ZOOM = VK_ZOOM,
   VKEY_NONAME = VK_NONAME,
   VKEY_PA1 = VK_PA1,
   VKEY_OEM_CLEAR = VK_OEM_CLEAR,
   VKEY_UNKNOWN = 0
 } KeyboardCode;
 
 }  // namespace views
 
 #endif  // BASE_KEYBOARD_CODES_WIN_H_