AcceleratorProvider: Make GetAcceleratorForCommandId const.

chrome/browser/ui/toolbar/recent_tabs_sub_menu_model.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/toolbar/recent_tabs_sub_menu_model.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
@@ skipping 234 matching lines @@
   if (command_id == kRecentlyClosedHeaderCommandId ||
       command_id == kDisabledRecentlyClosedHeaderCommandId ||
       command_id == IDC_RECENT_TABS_NO_DEVICE_TABS ||
       IsDeviceNameCommandId(command_id)) {
     return false;
   }
   return true;
 }
 
 bool RecentTabsSubMenuModel::GetAcceleratorForCommandId(
-    int command_id, ui::Accelerator* accelerator) {
+    int command_id,
+    ui::Accelerator* accelerator) const {
   // If there are no recently closed items, we show the accelerator beside
   // the header, otherwise, we show it beside the first item underneath it.
   int index_in_menu = GetIndexOfCommandId(command_id);
   int header_index = GetIndexOfCommandId(kRecentlyClosedHeaderCommandId);
   if ((command_id == kDisabledRecentlyClosedHeaderCommandId ||
        (header_index != -1 && index_in_menu == header_index + 1)) &&
       reopen_closed_tab_accelerator_.key_code() != ui::VKEY_UNKNOWN) {
     *accelerator = reopen_closed_tab_accelerator_;
     return true;
   }
@@ skipping 457 matching lines @@
 
   ui::MenuModelDelegate* menu_model_delegate = GetMenuModelDelegate();
   if (menu_model_delegate)
     menu_model_delegate->OnMenuStructureChanged();
 }
 
 void RecentTabsSubMenuModel::TabRestoreServiceDestroyed(
     sessions::TabRestoreService* service) {
   TabRestoreServiceChanged(service);
 }