Use single "modifiers" field rather than boolean fields.

chrome/browser/ui/views/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 CHROME_BROWSER_UI_VIEWS_ACCELERATOR_TABLE_H_
 #define CHROME_BROWSER_UI_VIEWS_ACCELERATOR_TABLE_H_
 #pragma once
 
 #include <stddef.h>
 
 #include "ui/base/keycodes/keyboard_codes.h"
 
 // This contains the list of accelerators for the Aura implementation.
 namespace browser {
 
 struct AcceleratorMapping {
   ui::KeyboardCode keycode;
-  bool shift_pressed;
-  bool ctrl_pressed;
-  bool alt_pressed;
+  int modifiers;
   int command_id;
 };
 
 // The list of accelerators.
 extern const AcceleratorMapping kAcceleratorMap[];
 
 // The numbers of elements in kAcceleratorMap.
 extern const size_t kAcceleratorMapLength;
 
 }  // namespace browser
 
 #endif  // CHROME_BROWSER_UI_VIEWS_ACCELERATOR_TABLE_H_