AcceleratorProvider: Make GetAcceleratorForCommandId const.

chrome/browser/ui/toolbar/app_menu_model.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_UI_TOOLBAR_APP_MENU_MODEL_H_
 #define CHROME_BROWSER_UI_TOOLBAR_APP_MENU_MODEL_H_
 
 #include <memory>
 
 #include "base/files/file_path.h"
@@ skipping 68 matching lines @@
 class EncodingMenuModel : public ui::SimpleMenuModel,
                           public ui::SimpleMenuModel::Delegate {
  public:
   explicit EncodingMenuModel(Browser* browser);
   ~EncodingMenuModel() override;
 
   // Overridden from ui::SimpleMenuModel::Delegate:
   bool IsCommandIdChecked(int command_id) const override;
   bool IsCommandIdEnabled(int command_id) const override;
   bool GetAcceleratorForCommandId(int command_id,
-                                  ui::Accelerator* accelerator) override;
+                                  ui::Accelerator* accelerator) const override;
   void ExecuteCommand(int command_id, int event_flags) override;
 
  private:
   void Build();
 
   Browser* browser_;  // weak
 
   DISALLOW_COPY_AND_ASSIGN(EncodingMenuModel);
 };
 
@@ skipping 41 matching lines @@
 
   // Overridden for both ButtonMenuItemModel::Delegate and SimpleMenuModel:
   bool IsItemForCommandIdDynamic(int command_id) const override;
   base::string16 GetLabelForCommandId(int command_id) const override;
   bool GetIconForCommandId(int command_id, gfx::Image* icon) const override;
   void ExecuteCommand(int command_id, int event_flags) override;
   bool IsCommandIdChecked(int command_id) const override;
   bool IsCommandIdEnabled(int command_id) const override;
   bool IsCommandIdVisible(int command_id) const override;
   bool GetAcceleratorForCommandId(int command_id,
-                                  ui::Accelerator* accelerator) override;
+                                  ui::Accelerator* accelerator) const override;
 
   // Overridden from TabStripModelObserver:
   void ActiveTabChanged(content::WebContents* old_contents,
                         content::WebContents* new_contents,
                         int index,
                         int reason) override;
   void TabReplacedAt(TabStripModel* tab_strip_model,
                      content::WebContents* old_contents,
                      content::WebContents* new_contents,
                      int index) override;
@@ skipping 85 matching lines @@
   Browser* browser_;  // weak
 
   std::unique_ptr<content::HostZoomMap::Subscription>
       browser_zoom_subscription_;
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(AppMenuModel);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_APP_MENU_MODEL_H_