Disable history menu in incognito or guest mode

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 "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 816 matching lines @@
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_MENU, true);
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_PLUS, true);
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_NORMAL, true);
   command_updater_.UpdateCommandEnabled(IDC_ZOOM_MINUS, true);
 
   // Show various bits of UI
   UpdateOpenFileState();
   command_updater_.UpdateCommandEnabled(IDC_CREATE_SHORTCUTS, false);
   UpdateCommandsForDevTools();
   command_updater_.UpdateCommandEnabled(IDC_TASK_MANAGER, CanOpenTaskManager());
-  command_updater_.UpdateCommandEnabled(IDC_SHOW_HISTORY, true);
+  command_updater_.UpdateCommandEnabled(IDC_SHOW_HISTORY,
+                                        !Profile::IsGuestSession());
   command_updater_.UpdateCommandEnabled(IDC_SHOW_DOWNLOADS, true);
   command_updater_.UpdateCommandEnabled(IDC_HELP_PAGE_VIA_KEYBOARD, true);
   command_updater_.UpdateCommandEnabled(IDC_HELP_PAGE_VIA_MENU, true);
   command_updater_.UpdateCommandEnabled(IDC_BOOKMARKS_MENU, true);
 
   command_updater_.UpdateCommandEnabled(
       IDC_SHOW_SYNC_SETUP, profile()->GetOriginalProfile()->IsSyncAccessible());
 
   // Initialize other commands based on the window type.
   bool normal_window = browser_->is_type_tabbed();
@@ skipping 317 matching lines @@
 
 BrowserWindow* BrowserCommandController::window() {
   return browser_->window();
 }
 
 Profile* BrowserCommandController::profile() {
   return browser_->profile();
 }
 
 }  // namespace chrome