AcceleratorProvider: Make GetAcceleratorForCommandId const.

components/translate/core/browser/options_menu_model.cc

 // Copyright 2014 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 "components/translate/core/browser/options_menu_model.h"
 
 #include "base/metrics/histogram.h"
 #include "build/build_config.h"
 #include "components/translate/core/browser/translate_driver.h"
 #include "components/translate/core/browser/translate_infobar_delegate.h"
@@ skipping 84 matching lines @@
           !translate_infobar_delegate_->IsSiteBlacklisted());
 
     default:
       break;
   }
   return true;
 }
 
 bool OptionsMenuModel::GetAcceleratorForCommandId(
     int command_id,
-    ui::Accelerator* accelerator) {
+    ui::Accelerator* accelerator) const {
   return false;
 }
 
 void OptionsMenuModel::ExecuteCommand(int command_id, int event_flags) {
   switch (command_id) {
     case NEVER_TRANSLATE_LANGUAGE:
       translate_infobar_delegate_->ToggleTranslatableLanguageByPrefs();
       break;
 
     case NEVER_TRANSLATE_SITE:
@@ skipping 16 matching lines @@
       break;
     }
 
     default:
       NOTREACHED() << "Invalid command id from menu.";
       break;
   }
 }
 
 }  // namespace translate