AcceleratorProvider: Make GetAcceleratorForCommandId const.

chrome/browser/ui/ash/multi_user/multi_user_context_menu_chromeos.cc

 // Copyright 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/ash/multi_user/multi_user_context_menu.h"
 
 #include "ash/common/multi_profile_uma.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/wm_shell.h"
 #include "base/bind.h"
@@ skipping 23 matching lines @@
 class MultiUserContextMenuChromeos : public ui::SimpleMenuModel,
                                      public ui::SimpleMenuModel::Delegate {
  public:
   explicit MultiUserContextMenuChromeos(aura::Window* window);
   ~MultiUserContextMenuChromeos() override {}
 
   // SimpleMenuModel::Delegate:
   bool IsCommandIdChecked(int command_id) const override { return false; }
   bool IsCommandIdEnabled(int command_id) const override { return true; }
   bool GetAcceleratorForCommandId(int command_id,
-                                  ui::Accelerator* accelerator) override {
+                                  ui::Accelerator* accelerator) const override {
     return false;
   }
   void ExecuteCommand(int command_id, int event_flags) override;
 
  private:
   // The window for which this menu is.
   aura::Window* window_;
 
   DISALLOW_COPY_AND_ASSIGN(MultiUserContextMenuChromeos);
 };
@@ skipping 88 matching lines @@
           return;
         }
       }
       chromeos::ShowMultiprofilesWarningDialog(on_accept);
       return;
     }
     default:
       NOTREACHED();
   }
 }