mac: Remove now-unnecessary respondsToSelector: call

chrome/browser/app_controller_mac.mm

 // 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.
 
 #import "chrome/browser/app_controller_mac.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 563 matching lines @@
   // We need a valid g_browser_process to get the profile which is why we can't
   // call this from awakeFromNib.
   NSMenu* viewMenu = [[[NSApp mainMenu] itemWithTag:IDC_VIEW_MENU] submenu];
   NSMenuItem* encodingMenuItem = [viewMenu itemWithTag:IDC_ENCODING_MENU];
   NSMenu* encodingMenu = [encodingMenuItem submenu];
   EncodingMenuControllerDelegate::BuildEncodingMenu([self lastProfile],
                                                     encodingMenu);
 
   // Since Chrome is localized to more languages than the OS, tell Cocoa which
   // menu is the Help so it can add the search item to it.
-  if (helpMenu_ && [NSApp respondsToSelector:@selector(setHelpMenu:)])
-    [NSApp setHelpMenu:helpMenu_];
+  [NSApp setHelpMenu:helpMenu_];
 
   // Record the path to the (browser) app bundle; this is used by the app mode
   // shim.
   RecordLastRunAppBundlePath();
 
   // Makes "Services" menu items available.
   [self registerServicesMenuTypesTo:[notify object]];
 
   startupComplete_ = YES;
 
@@ skipping 712 matching lines @@
 
 }  // namespace browser
 
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {
   return g_is_opening_new_window;
 }
 
 }  // namespace app_controller_mac