mac: Load the system hotkeys after launch. (reland)

chrome/browser/ui/cocoa/system_hotkey_map.h

-// Copyright 2014 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_COCOA_SYSTEM_HOTKEY_MAP_H_
-#define CHROME_BROWSER_UI_COCOA_SYSTEM_HOTKEY_MAP_H_
-
-#import <Foundation/Foundation.h>
-#include <vector>
-
-#include "base/macros.h"
-
-struct SystemHotkey;
-
-// Maintains a listing of all OSX user modifiable hotkeys. e.g. (cmd + `)
-class SystemHotkeyMap {
- public:
-  SystemHotkeyMap();
-  ~SystemHotkeyMap();
-
-  // Parses the property list data commonly stored at
-  // ~/Library/Preferences/com.apple.symbolichotkeys.plist
-  // Returns false on encountering an irrecoverable error.
-  // Can be called multiple times. Only the results from the most recent
-  // invocation are stored.
-  bool ParseData(NSData* data);
-
-  // Whether the hotkey has been reserved by the user.
-  bool IsHotkeyReserved(int key_code, int modifiers);
-
- private:
-  // Create at least one record of a hotkey that is reserved by the user.
-  // Certain system hotkeys automatically reserve multiple key combinations.
-  void ReserveHotkey(int key_code, int modifiers, NSString* system_effect);
-
-  // Create a record of a hotkey that is reserved by the user.
-  void ReserveHotkey(int key_code, int modifiers);
-
-  std::vector<SystemHotkey> system_hotkeys_;
-
-  DISALLOW_COPY_AND_ASSIGN(SystemHotkeyMap);
-};
-
-#endif  // CHROME_BROWSER_UI_COCOA_SYSTEM_HOTKEY_MAP_H_