[DomKey] Support Japanese (JIS) layout special keys

ui/events/keycodes/keyboard_codes_win.h

 // Copyright (c) 2012 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_KEYCODES_KEYBOARD_CODES_WIN_H_
 #define UI_EVENTS_KEYCODES_KEYBOARD_CODES_WIN_H_
 
 #include <windows.h>
 #include <ime.h>
 
@@ skipping 152 matching lines @@
   VKEY_OEM_2 = VK_OEM_2,
   VKEY_OEM_3 = VK_OEM_3,
   VKEY_OEM_4 = VK_OEM_4,
   VKEY_OEM_5 = VK_OEM_5,
   VKEY_OEM_6 = VK_OEM_6,
   VKEY_OEM_7 = VK_OEM_7,
   VKEY_OEM_8 = VK_OEM_8,
   VKEY_OEM_102 = VK_OEM_102,
   VKEY_PROCESSKEY = VK_PROCESSKEY,
   VKEY_PACKET = VK_PACKET,
+  VKEY_OEM_ATTN = VK_OEM_ATTN,
+  VKEY_OEM_FINISH = VK_OEM_FINISH,
+  VKEY_OEM_COPY = VK_OEM_COPY,
   VKEY_DBE_SBCSCHAR = VK_DBE_SBCSCHAR,
   VKEY_DBE_DBCSCHAR = VK_DBE_DBCSCHAR,
+  VKEY_OEM_BACKTAB = VK_OEM_BACKTAB,
   VKEY_ATTN = VK_ATTN,
   VKEY_CRSEL = VK_CRSEL,
   VKEY_EXSEL = VK_EXSEL,
   VKEY_EREOF = VK_EREOF,
   VKEY_PLAY = VK_PLAY,
   VKEY_ZOOM = VK_ZOOM,
   VKEY_NONAME = VK_NONAME,
   VKEY_PA1 = VK_PA1,
   VKEY_OEM_CLEAR = VK_OEM_CLEAR,
   VKEY_UNKNOWN = 0,
 
   // Windows does not have a specific key code for AltGr. We use the unused
   // VK_OEM_AX to represent AltGr, matching the behaviour of Firefox on Linux.
   VKEY_ALTGR = VK_OEM_AX,
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_KEYCODES_KEYBOARD_CODES_WIN_H_