It is time.

ui/base/models/menu_model.cc

-// Copyright (c) 2011 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 "ui/base/models/menu_model.h"
-
-namespace ui {
-
-bool MenuModel::IsVisibleAt(int index) const {
-  return true;
-}
-
-// static
-bool MenuModel::GetModelAndIndexForCommandId(int command_id,
-                                             MenuModel** model,
-                                             int* index) {
-  const int item_count = (*model)->GetItemCount();
-  for (int i = 0; i < item_count; ++i) {
-    const int candidate_index = i;
-    if ((*model)->GetTypeAt(candidate_index) == TYPE_SUBMENU) {
-      MenuModel* submenu_model = (*model)->GetSubmenuModelAt(candidate_index);
-      if (GetModelAndIndexForCommandId(command_id, &submenu_model, index)) {
-        *model = submenu_model;
-        return true;
-      }
-    }
-    if ((*model)->GetCommandIdAt(candidate_index) == command_id) {
-      *index = candidate_index;
-      return true;
-    }
-  }
-  return false;
-}
-
-base::string16 MenuModel::GetSublabelAt(int index) const {
-  return base::string16();
-}
-
-base::string16 MenuModel::GetMinorTextAt(int index) const {
-  return base::string16();
-}
-
-const gfx::FontList* MenuModel::GetLabelFontListAt(int index) const {
-  return NULL;
-}
-
-// Default implementation ignores the event flags.
-void MenuModel::ActivatedAt(int index, int event_flags) {
-  ActivatedAt(index);
-}
-
-}  // namespace ui