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

chrome/browser/browser.cc

 // 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.
 
 #include "chrome/browser/browser.h"
 
 #if defined(OS_WIN)
 #include <shellapi.h>
 #include <windows.h>
 #endif  // OS_WIN
@@ skipping 2150 matching lines @@
     case IDC_MANAGE_EXTENSIONS:     ShowExtensionsTab();              break;
     case IDC_SYNC_BOOKMARKS:        OpenSyncMyBookmarksDialog();      break;
 #if defined(ENABLE_REMOTING)
     case IDC_REMOTING_SETUP:        OpenRemotingSetupDialog();        break;
 #endif
     case IDC_OPTIONS:               OpenOptionsDialog();              break;
     case IDC_EDIT_SEARCH_ENGINES:   OpenKeywordEditor();              break;
     case IDC_VIEW_PASSWORDS:        OpenPasswordManager();            break;
     case IDC_CLEAR_BROWSING_DATA:   OpenClearBrowsingDataDialog();    break;
     case IDC_IMPORT_SETTINGS:       OpenImportSettingsDialog();       break;
-    case IDC_ABOUT:
-      if (Singleton<UpgradeDetector>::get()->notify_upgrade())
-        OpenUpdateChromeDialog();
-      else
-        OpenAboutChromeDialog();
-      break;
+    case IDC_ABOUT:                 OpenAboutChromeDialog();          break;
+    case IDC_UPGRADE_DIALOG:        OpenUpdateChromeDialog();         break;
     case IDC_HELP_PAGE:             OpenHelpTab();                    break;
 #if defined(OS_CHROMEOS)
     case IDC_SYSTEM_OPTIONS:        OpenSystemOptionsDialog();        break;
     case IDC_INTERNET_OPTIONS:      OpenInternetOptionsDialog();      break;
     case IDC_LANGUAGE_OPTIONS:      OpenLanguageOptionsDialog();      break;
 #endif
 
     default:
       LOG(WARNING) << "Received Unimplemented Command: " << id;
       break;
@@ skipping 1131 matching lines @@
   command_updater_.UpdateCommandEnabled(IDC_FIND_NEXT, non_devtools_window);
   command_updater_.UpdateCommandEnabled(IDC_FIND_PREVIOUS, non_devtools_window);
 
   // AutoFill
   command_updater_.UpdateCommandEnabled(IDC_AUTOFILL_DEFAULT,
                                         non_devtools_window);
 
   // Show various bits of UI
   command_updater_.UpdateCommandEnabled(IDC_CLEAR_BROWSING_DATA, normal_window);
 
+  // The upgrade entry should always be enabled. Whether it is visible is a
+  // separate matter determined on menu show.
+  command_updater_.UpdateCommandEnabled(IDC_UPGRADE_DIALOG, true);
+
   // Initialize other commands whose state changes based on fullscreen mode.
   UpdateCommandsForFullscreenMode(false);
 }
 
 void Browser::UpdateCommandsForTabState() {
   TabContents* current_tab = GetSelectedTabContents();
   if (!current_tab)  // May be NULL during tab restore.
     return;
 
   // Navigation commands
@@ skipping 678 matching lines @@
 }
 
 void Browser::TabRestoreServiceDestroyed(TabRestoreService* service) {
   if (!tab_restore_service_)
     return;
 
   DCHECK_EQ(tab_restore_service_, service);
   tab_restore_service_->RemoveObserver(this);
   tab_restore_service_ = NULL;
 }