Fix for Ash shortcuts unexpectedly working in system model dialog

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 "ui/base/events/event_constants.h"
 
@@ skipping 112 matching lines @@
 // The number of elements in kActionsAllowedAtLoginOrLockScreen.
 ASH_EXPORT extern const size_t kActionsAllowedAtLoginOrLockScreenLength;
 
 // Actions allowed while screen is locked (in addition to
 // kActionsAllowedAtLoginOrLockScreen).
 ASH_EXPORT extern const AcceleratorAction kActionsAllowedAtLockScreen[];
 
 // The number of elements in kActionsAllowedAtLockScreen.
 ASH_EXPORT extern const size_t kActionsAllowedAtLockScreenLength;
 
+// Actions allowed while a modal window is up.
+ASH_EXPORT extern const AcceleratorAction kActionsAllowedAtModalWindow[];
+
+// The number of elements in kActionsAllowedAtModalWindow.
+ASH_EXPORT extern const size_t kActionsAllowedAtModalWindowLength;
+
 }  // namespace ash
 
 #endif  // ASH_ACCELERATORS_ACCELERATOR_TABLE_H_