AcceleratorProvider: Make GetAcceleratorForCommandId const.

chrome/browser/ui/views/toolbar/toolbar_view.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 119 matching lines @@
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // content::NotificationObserver:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // ui::AcceleratorProvider:
   bool GetAcceleratorForCommandId(int command_id,
-                                  ui::Accelerator* accelerator) override;
+                                  ui::Accelerator* accelerator) const override;
 
   // views::View:
   gfx::Size GetPreferredSize() const override;
   gfx::Size GetMinimumSize() const override;
   void Layout() override;
   void OnThemeChanged() override;
   const char* GetClassName() const override;
   bool AcceleratorPressed(const ui::Accelerator& acc) override;
 
  protected:
@@ skipping 64 matching lines @@
 
   // The display mode used when laying out the toolbar.
   const DisplayMode display_mode_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ToolbarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_