Linux Aura: Use system title bar is now set by preference, not flag.

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

 // Copyright (c) 2013 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/system_menu_model_builder.h"
 
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/ui/browser_commands.h"
@@ skipping 46 matching lines @@
 }
 
 void SystemMenuModelBuilder::BuildSystemMenuForBrowserWindow(
     ui::SimpleMenuModel* model) {
   model->AddItemWithStringId(IDC_NEW_TAB, IDS_NEW_TAB);
   model->AddItemWithStringId(IDC_RESTORE_TAB, IDS_RESTORE_TAB);
   if (chrome::CanOpenTaskManager()) {
     model->AddSeparator(ui::NORMAL_SEPARATOR);
     model->AddItemWithStringId(IDC_TASK_MANAGER, IDS_TASK_MANAGER);
   }
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+  model->AddSeparator(ui::NORMAL_SEPARATOR);
+  model->AddCheckItemWithStringId(IDC_USE_SYSTEM_TITLE_BAR,
+                                  IDS_SHOW_WINDOW_DECORATIONS_MENU);
+#endif
   AppendTeleportMenu(model);
   // If it's a regular browser window with tabs, we don't add any more items,
   // since it already has menus (Page, Chrome).
 }
 
 void SystemMenuModelBuilder::BuildSystemMenuForAppOrPopupWindow(
     ui::SimpleMenuModel* model) {
   model->AddItemWithStringId(IDC_BACK, IDS_CONTENT_CONTEXT_BACK);
   model->AddItemWithStringId(IDC_FORWARD, IDS_CONTENT_CONTEXT_FORWARD);
   model->AddItemWithStringId(IDC_RELOAD, IDS_APP_MENU_RELOAD);
@@ skipping 68 matching lines @@
     model->AddItem(
         user_index == 1 ? IDC_VISIT_DESKTOP_OF_LRU_USER_2 :
                           IDC_VISIT_DESKTOP_OF_LRU_USER_3,
         l10n_util::GetStringFUTF16(
             IDS_VISIT_DESKTOP_OF_LRU_USER,
             delegate->GetUserDisplayName(user_index),
             base::ASCIIToUTF16(delegate->GetUserEmail(user_index))));
   }
 #endif
 }