AcceleratorProvider: Make GetAcceleratorForCommandId const.

chrome/browser/ui/autofill/autofill_dialog_models.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_AUTOFILL_AUTOFILL_DIALOG_MODELS_H_
 #define CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_MODELS_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 67 matching lines @@
 
   int checked_item() const { return checked_item_; }
 
   // Enable/disable an item by key.
   void SetEnabled(const std::string& item_key, bool enabled);
 
   // ui::SimpleMenuModel::Delegate implementation.
   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:
   // Represents an item in this model.
   struct Item {
     std::string key;  //  The key of the item.
     bool enabled;  // Whether the item is selectable.
   };
   // The items this model represents in presentation order.
   // Note: the index in this vector is the |command_id| of the item.
@@ skipping 40 matching lines @@
  private:
   // The current year (e.g., 2012).
   int this_year_;
 
   DISALLOW_COPY_AND_ASSIGN(YearComboboxModel);
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_AUTOFILL_AUTOFILL_DIALOG_MODELS_H_