Let the MainController dismiss presented modals.

ios/chrome/browser/ui/commands/ios_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 IOS_CHROME_BROWSER_UI_COMMANDS_IOS_COMMAND_IDS_H_
 #define IOS_CHROME_BROWSER_UI_COMMANDS_IOS_COMMAND_IDS_H_
 
 // This file lists all the command IDs understood by e.g. the browser.
 // It is used by NIB files.
 
 // NIB files include ID numbers rather than the corresponding #define labels.
 // If you change a given command's number, any NIB files that refer to it will
 // also need to be updated.
 
 // Do not use IDs below 40900 while the iOS build still depends on //chrome, to
 // avoid conflicts.
 // TODO(droger): Remove this comment once iOS no longer depends on //chrome.
 #define IDC_SHOW_TOOLS_MENU                            40900
 #define IDC_TOGGLE_TAB_SWITCHER                        40901
 #define IDC_VOICE_SEARCH                               40902
 #define IDC_NEW_INCOGNITO_TAB                          40903
 #define IDC_CLOSE_ALL_TABS                             40904
 #define IDC_SHOW_SIGNIN_IOS                            40905
 #define IDC_SWITCH_BROWSER_MODES                       40906
 #define IDC_FIND_CLOSE                                 40907
 #define IDC_FIND_UPDATE                                40908
+#define IDC_CLOSE_MODALS                               40909
 #define IDC_SHOW_PAGE_INFO                             40911
 #define IDC_HIDE_PAGE_INFO                             40912
 #define IDC_SHOW_SECURITY_HELP                         40913
 #define IDC_SHOW_SYNC_SETTINGS                         40914
 #define IDC_OPEN_URL                                   40915
 #define IDC_SETUP_FOR_TESTING                          40916
 #define IDC_SHOW_OTHER_DEVICES                         40917
 #define IDC_CLOSE_ALL_INCOGNITO_TABS                   40918
 #define IDC_CLOSE_SETTINGS_AND_OPEN_URL                40920
 #define IDC_REQUEST_DESKTOP_SITE                       40921
@@ skipping 17 matching lines @@
 #define IDC_SHOW_ACCOUNTS_SETTINGS                     40943
 #define IDC_CLOSE_SETTINGS                             40944
 #define IDC_SHOW_SAVE_PASSWORDS_SETTINGS               40945
 #define IDC_READER_MODE                                40947
 #define IDC_RATE_THIS_APP                              40948
 // Do not use IDs above 40999 while the iOS build still depends on //chrome, to
 // avoid conflicts.
 // TODO(droger): Remove this comment once iOS no longer depends on //chrome.
 
 #endif  // IOS_CHROME_BROWSER_UI_COMMANDS_IOS_COMMAND_IDS_H_