Revert of Delete dead signin code (SigninGlobalError)

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 172 matching lines @@
 #define IDC_HELP_PAGE_VIA_KEYBOARD      40019
 #define IDC_HELP_PAGE_VIA_MENU          40020
 #define IDC_SHOW_APP_MENU               40021
 #define IDC_MANAGE_EXTENSIONS           40022
 #define IDC_DEV_TOOLS_INSPECT           40023
 #define IDC_UPGRADE_DIALOG              40024
 #define IDC_VIEW_INCOMPATIBILITIES      40025
 #define IDC_SHOW_KEYBOARD_OVERLAY       40027
 #define IDC_PROFILING_ENABLED           40028
 #define IDC_BOOKMARKS_MENU              40029
+// TODO(atwilson): Remove IDC_SHOW_SYNC_SETUP when we officially allow signin
+// when sync is disabled.
+#define IDC_SHOW_SYNC_SETUP             40030
+#define IDC_SHOW_SIGNIN                 40030
 #define IDC_EXTENSION_ERRORS            40031
 #define IDC_SHOW_SIGNIN_ERROR           40032
 #define IDC_SHOW_SETTINGS_CHANGE_FIRST  40033
 #define IDC_SHOW_SETTINGS_CHANGE_LAST   40133
 #define IDC_SHOW_AVATAR_MENU            40134
 #define IDC_EXTENSION_DISABLED_FIRST    40135
 #define IDC_EXTENSION_DISABLED_LAST     40235
 #define IDC_TOGGLE_REQUEST_TABLET_SITE  40236
 #define IDC_DEV_TOOLS_TOGGLE            40237
 #define IDC_EXTERNAL_EXTENSION_ALERT    40238
@@ skipping 163 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_