AcceleratorProvider: Make GetAcceleratorForCommandId const.

chrome/browser/ui/ash/launcher/launcher_context_menu.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/ash/launcher/launcher_context_menu.h"
 
 #include <string>
 
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/wm_shelf.h"
@@ skipping 91 matching lines @@
           ->CanOpenSetWallpaperPage();
     case MENU_AUTO_HIDE:
       return CanUserModifyShelfAutoHideBehavior(controller_->GetProfile());
     default:
       DCHECK(command_id < MENU_ITEM_COUNT);
       return true;
   }
 }
 
 bool LauncherContextMenu::GetAcceleratorForCommandId(
-      int command_id,
-      ui::Accelerator* accelerator) {
+    int command_id,
+    ui::Accelerator* accelerator) const {
   return false;
 }
 
 void LauncherContextMenu::ExecuteCommand(int command_id, int event_flags) {
   switch (static_cast<MenuItem>(command_id)) {
     case MENU_OPEN_NEW:
       controller_->Launch(item_.id, ui::EF_NONE);
       break;
     case MENU_CLOSE:
       if (item_.type == ash::TYPE_DIALOG) {
@@ skipping 82 matching lines @@
     case MENU_PIN:
     case MENU_AUTO_HIDE:
     case MENU_ALIGNMENT_MENU:
     case MENU_CHANGE_WALLPAPER:
       LauncherContextMenu::ExecuteCommand(command_id, event_flags);
       return true;
     default:
       return false;
   }
 }