Adds an ash global shortcut key for message center.

ash/accelerators/accelerator_table.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 ASH_ACCELERATORS_ACCELERATOR_TABLE_H_
 #define ASH_ACCELERATORS_ACCELERATOR_TABLE_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "ui/base/events/event_constants.h"
@@ skipping 39 matching lines @@
   SELECT_LAST_WIN,
   SELECT_WIN_0,
   SELECT_WIN_1,
   SELECT_WIN_2,
   SELECT_WIN_3,
   SELECT_WIN_4,
   SELECT_WIN_5,
   SELECT_WIN_6,
   SELECT_WIN_7,
   SHOW_KEYBOARD_OVERLAY,
+  SHOW_MESSAGE_CENTER_BUBBLE,
   SHOW_OAK,
   SHOW_SYSTEM_TRAY_BUBBLE,
   SHOW_TASK_MANAGER,
   SWAP_PRIMARY_DISPLAY,
   SWITCH_IME,  // Switch to another IME depending on the accelerator.
   TAKE_PARTIAL_SCREENSHOT,
   TAKE_SCREENSHOT,
   TOGGLE_APP_LIST,
   TOGGLE_CAPS_LOCK,
   TOGGLE_CAPS_LOCK_BY_ALT_LWIN,
@@ skipping 73 matching lines @@
 
 // Actions which will not be repeated while holding an accelerator key.
 ASH_EXPORT extern const AcceleratorAction kNonrepeatableActions[];
 
 // The number of elements in kNonrepeatableActions.
 ASH_EXPORT extern const size_t kNonrepeatableActionsLength;
 
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ACCELERATOR_TABLE_H_