Implement a Menu Item to Hide the Toolbar in Fullscreen

chrome/app/chrome_command_ids.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_APP_CHROME_COMMAND_IDS_H_
 #define CHROME_APP_CHROME_COMMAND_IDS_H_
 
 // This file lists all the command IDs understood by e.g. the browser.
 // It is used by Windows RC files, Mac NIB files, and other platforms too.
 
@@ skipping 200 matching lines @@
 #define IDC_SHOW_SETTINGS_RESET_BUBBLE  40241
 #define IDC_SHOW_SYNC_ERROR             40242
 #define IDC_DISTILL_PAGE                40243
 #define IDC_HELP_MENU                   40244
 #define IDC_EXTENSIONS_OVERFLOW_MENU    40245
 #define IDC_SHOW_SRT_BUBBLE             40246
 #define IDC_ELEVATED_RECOVERY_DIALOG    40247
 #define IDC_TAKE_SCREENSHOT             40248
 #define IDC_MORE_TOOLS_MENU             40249
 #define IDC_SHOW_FAST_USER_SWITCHER     40250
+#define IDC_TOGGLE_FULLSCREEN_TOOLBAR   40251
 
 // Spell-check
 // Insert any additional suggestions before _LAST; these have to be consecutive.
 #define IDC_SPELLCHECK_SUGGESTION_0     41000
 #define IDC_SPELLCHECK_SUGGESTION_1     41001
 #define IDC_SPELLCHECK_SUGGESTION_2     41002
 #define IDC_SPELLCHECK_SUGGESTION_3     41003
 #define IDC_SPELLCHECK_SUGGESTION_4     41004
 #define IDC_SPELLCHECK_SUGGESTION_LAST  IDC_SPELLCHECK_SUGGESTION_4
 #define IDC_SPELLCHECK_MENU             41005
@@ skipping 143 matching lines @@
 // See http://msdn.microsoft.com/en-us/library/t2zechd4(VS.71).aspx
 
 // Starting command id for menus showing bookmarks (such as the wrench menu).
 // While command ids passed to Windows functions must not be higher than 0xDFFF,
 // these IDs are not exposed to the native system and thus can be in this
 // otherwise-reserved range. No command used in a menu (such as the wrench menu)
 // should be higher than this, otherwise it'll conflict.
 #define IDC_FIRST_BOOKMARK_MENU 0xE000
 
 #endif  // CHROME_APP_CHROME_COMMAND_IDS_H_