Removing the menu entry to start the ash desktop in Windows.

chrome/browser/ui/views/frame/browser_view.cc

 // Copyright 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/views/frame/browser_view.h"
 
 #include <algorithm>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 2336 matching lines @@
   for (size_t i = 0; i < chrome::kAcceleratorMapLength; ++i) {
     ui::Accelerator accelerator(chrome::kAcceleratorMap[i].keycode,
                                 chrome::kAcceleratorMap[i].modifiers);
     accelerator_table_[accelerator] = chrome::kAcceleratorMap[i].command_id;
 
     // Also register with the focus manager.
     focus_manager->RegisterAccelerator(
         accelerator, ui::AcceleratorManager::kNormalPriority, this);
   }
 #endif
-#if defined(OS_WIN) && defined(USE_AURA)
-    if (base::win::GetVersion() < base::win::VERSION_WIN8) {
-      ui::Accelerator accelerator(ui::VKEY_A,
-                                  ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN);
-      accelerator_table_[accelerator] = IDC_TOGGLE_ASH_DESKTOP;
-      focus_manager->RegisterAccelerator(
-          accelerator, ui::AcceleratorManager::kNormalPriority, this);
-    }
-#endif
 }
 
 int BrowserView::GetCommandIDForAppCommandID(int app_command_id) const {
 #if defined(OS_WIN) && !defined(USE_AURA)
   switch (app_command_id) {
     // NOTE: The order here matches the APPCOMMAND declaration order in the
     // Windows headers.
     case APPCOMMAND_BROWSER_BACKWARD: return IDC_BACK;
     case APPCOMMAND_BROWSER_FORWARD:  return IDC_FORWARD;
     case APPCOMMAND_BROWSER_REFRESH:  return IDC_RELOAD;
@@ skipping 241 matching lines @@
 
   Browser* modal_browser =
       chrome::FindBrowserWithWebContents(active_dialog->web_contents());
   if (modal_browser && (browser_ != modal_browser)) {
     modal_browser->window()->FlashFrame(true);
     modal_browser->window()->Activate();
   }
 
   AppModalDialogQueue::GetInstance()->ActivateModalDialog();
 }