Remove the Exit menu item from the Wrench menu in Win/Ash.

chrome/browser/ui/browser_command_controller.cc

 // 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.
 
 #include "chrome/browser/ui/browser_command_controller.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/defaults.h"
@@ skipping 791 matching lines @@
   command_updater_.UpdateCommandEnabled(IDC_RELOAD, true);
   command_updater_.UpdateCommandEnabled(IDC_RELOAD_IGNORING_CACHE, true);
   command_updater_.UpdateCommandEnabled(IDC_RELOAD_CLEARING_CACHE, true);
 
   // Window management commands
   command_updater_.UpdateCommandEnabled(IDC_CLOSE_WINDOW, true);
   command_updater_.UpdateCommandEnabled(IDC_NEW_TAB, true);
   command_updater_.UpdateCommandEnabled(IDC_CLOSE_TAB, true);
   command_updater_.UpdateCommandEnabled(IDC_DUPLICATE_TAB, true);
   command_updater_.UpdateCommandEnabled(IDC_RESTORE_TAB, false);
-  command_updater_.UpdateCommandEnabled(IDC_EXIT, true);
+#if defined(OS_WIN) && defined(USE_ASH)
+  if (browser_->host_desktop_type() != chrome::HOST_DESKTOP_TYPE_ASH)
+    command_updater_.UpdateCommandEnabled(IDC_EXIT, true);

[Andrew T Wilson (Slow), 2013/02/26 16:29:36]

Note that this code is no longer executed on non-win-ash platforms which leaves
Exit disabled permanently.

+#endif
   command_updater_.UpdateCommandEnabled(IDC_DEBUG_FRAME_TOGGLE, true);
 #if defined(OS_WIN) && defined(USE_ASH) && !defined(NDEBUG)
   if (base::win::GetVersion() < base::win::VERSION_WIN8 &&
       chrome::HOST_DESKTOP_TYPE_NATIVE != chrome::HOST_DESKTOP_TYPE_ASH)
     command_updater_.UpdateCommandEnabled(IDC_TOGGLE_ASH_DESKTOP, true);
 #endif
 
   // Page-related commands
   command_updater_.UpdateCommandEnabled(IDC_EMAIL_PAGE_LOCATION, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_AUTO_DETECT, true);
@@ skipping 408 matching lines @@
 
 BrowserWindow* BrowserCommandController::window() {
   return browser_->window();
 }
 
 Profile* BrowserCommandController::profile() {
   return browser_->profile();
 }
 
 }  // namespace chrome