AcceleratorProvider: Make GetAcceleratorForCommandId const.

ash/common/shelf/shelf_alignment_menu.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 "ash/common/shelf/shelf_alignment_menu.h"
 
 #include "ash/common/metrics/user_metrics_action.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/wm_shell.h"
@@ skipping 29 matching lines @@
   }
   return false;
 }
 
 bool ShelfAlignmentMenu::IsCommandIdEnabled(int command_id) const {
   return true;
 }
 
 bool ShelfAlignmentMenu::GetAcceleratorForCommandId(
     int command_id,
-    ui::Accelerator* accelerator) {
+    ui::Accelerator* accelerator) const {
   return false;
 }
 
 void ShelfAlignmentMenu::ExecuteCommand(int command_id, int event_flags) {
   WmShell* shell = WmShell::Get();
   switch (static_cast<MenuItem>(command_id)) {
     case MENU_ALIGN_LEFT:
       shell->RecordUserMetricsAction(UMA_SHELF_ALIGNMENT_SET_LEFT);
       wm_shelf_->SetAlignment(SHELF_ALIGNMENT_LEFT);
       break;
     case MENU_ALIGN_BOTTOM:
       shell->RecordUserMetricsAction(UMA_SHELF_ALIGNMENT_SET_BOTTOM);
       wm_shelf_->SetAlignment(SHELF_ALIGNMENT_BOTTOM);
       break;
     case MENU_ALIGN_RIGHT:
       shell->RecordUserMetricsAction(UMA_SHELF_ALIGNMENT_SET_RIGHT);
       wm_shelf_->SetAlignment(SHELF_ALIGNMENT_RIGHT);
       break;
   }
 }
 
 }  // namespace ash