AcceleratorProvider: Make GetAcceleratorForCommandId const.

chrome/browser/ui/views/frame/browser_view.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_VIEWS_FRAME_BROWSER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_VIEW_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 365 matching lines @@
                      int index,
                      bool foreground) override;
   void TabDetachedAt(content::WebContents* contents, int index) override;
   void TabDeactivated(content::WebContents* contents) override;
   void TabStripEmpty() override;
   void WillCloseAllTabs() override;
   void CloseAllTabsCanceled() override;
 
   // Overridden from ui::AcceleratorProvider:
   bool GetAcceleratorForCommandId(int command_id,
-                                  ui::Accelerator* accelerator) override;
+                                  ui::Accelerator* accelerator) const override;
 
   // Overridden from views::WidgetDelegate:
   bool CanResize() const override;
   bool CanMaximize() const override;
   bool CanMinimize() const override;
   bool CanActivate() const override;
   base::string16 GetWindowTitle() const override;
   base::string16 GetAccessibleWindowTitle() const override;
   views::View* GetInitiallyFocusedView() override;
   bool ShouldShowWindowTitle() const override;
@@ skipping 301 matching lines @@
   // The class that registers for keyboard shortcuts for extension commands.
   std::unique_ptr<ExtensionKeybindingRegistryViews>
       extension_keybinding_registry_;
 
   mutable base::WeakPtrFactory<BrowserView> activate_modal_dialog_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_VIEW_H_