mac: Create a static mapping of accelerators in the main menu.

ui/base/cocoa/cocoa_event_utils.h

 // Copyright 2013 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_BASE_COCOA_COCOA_EVENT_UTILS_H_
 #define UI_BASE_COCOA_COCOA_EVENT_UTILS_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "ui/base/ui_base_export.h"
 #include "ui/base/window_open_disposition.h"
 
 namespace ui {
 
 // Retrieves a bitsum of ui::EventFlags represented by |event|,
 UI_BASE_EXPORT int EventFlagsFromNSEvent(NSEvent* event);
 
+// Converts the Cocoa |modifiers| bitsum into a ui::EventFlags bitsum.
+UI_BASE_EXPORT int EventFlagsFromModifiers(NSUInteger modifiers);
+
 // Retrieves a bitsum of ui::EventFlags represented by |event|,
 // but instead use the modifier flags given by |modifiers|,
 // which is the same format as |-NSEvent modifierFlags|. This allows
 // substitution of the modifiers without having to create a new event from
 // scratch.
 UI_BASE_EXPORT int EventFlagsFromNSEventWithModifiers(NSEvent* event,
                                                       NSUInteger modifiers);
 
 // Retrieves the WindowOpenDisposition used to open a link from a user gesture
 // represented by |event|. For example, a Cmd+Click would mean open the
 // associated link in a background tab.
 UI_BASE_EXPORT WindowOpenDisposition
     WindowOpenDispositionFromNSEvent(NSEvent* event);
 
 // Retrieves the WindowOpenDisposition used to open a link from a user gesture
 // represented by |event|, but instead use the modifier flags given by |flags|,
 // which is the same format as |-NSEvent modifierFlags|. This allows
 // substitution of the modifiers without having to create a new event from
 // scratch.
 UI_BASE_EXPORT WindowOpenDisposition
     WindowOpenDispositionFromNSEventWithFlags(NSEvent* event, NSUInteger flags);
 
 }  // namespace ui
 
 #endif  // UI_BASE_COCOA_COCOA_EVENT_UTILS_H_