The "Update Chrome" menu item should appear in addition to the About menu.

chrome/browser/cocoa/menu_controller.mm

 // Copyright (c) 2010 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/cocoa/menu_controller.h"
 
 #include "app/l10n_util_mac.h"
 #include "app/menus/accelerator_cocoa.h"
 #include "app/menus/simple_menu_model.h"
 #include "base/logging.h"
@@ skipping 125 matching lines @@
 
   NSInteger modelIndex = [item tag];
   menus::MenuModel* model =
       static_cast<menus::MenuModel*>(
           [[(id)item representedObject] pointerValue]);
   DCHECK(model);
   if (model) {
     BOOL checked = model->IsItemCheckedAt(modelIndex);
     DCHECK([(id)item isKindOfClass:[NSMenuItem class]]);
     [(id)item setState:(checked ? NSOnState : NSOffState)];
+    [(id)item setHidden:(!model->IsVisibleAt(modelIndex))];
     if (model->IsLabelDynamicAt(modelIndex)) {
       NSString* label =
           l10n_util::FixUpWindowsStyleLabel(model->GetLabelAt(modelIndex));
       [(id)item setTitle:label];
     }
     return model->IsEnabledAt(modelIndex);
   }
   return NO;
 }
 
@@ skipping 19 matching lines @@
     if (useWithPopUpButtonCell_) {
       scoped_nsobject<NSMenuItem> blankItem(
           [[NSMenuItem alloc] initWithTitle:@"" action:nil keyEquivalent:@""]);
       [menu_ insertItem:blankItem atIndex:0];
     }
   }
   return menu_.get();
 }
 
 @end