Remove unused ShelfModelObserver::ShelfStatusChanged()

chrome/browser/ui/ash/launcher/chrome_launcher_controller.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_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 286 matching lines @@
 
   // ash::ShelfItemDelegateManagerObserver:
   void OnSetShelfItemDelegate(ash::ShelfID id,
                               ash::ShelfItemDelegate* item_delegate) override;
 
   // ash::ShelfModelObserver:
   void ShelfItemAdded(int index) override;
   void ShelfItemRemoved(int index, ash::ShelfID id) override;
   void ShelfItemMoved(int start_index, int target_index) override;
   void ShelfItemChanged(int index, const ash::ShelfItem& old_item) override;
-  void ShelfStatusChanged() override;
 
   // ash::ShellObserver:
   void OnShelfAlignmentChanged(aura::Window* root_window) override;
 
   // ash::WindowTreeHostManager::Observer:
   void OnDisplayConfigurationChanged() override;
 
   // ExtensionRegistryObserver:
   void OnExtensionLoaded(content::BrowserContext* browser_context,
                          const extensions::Extension* extension) override;
@@ skipping 284 matching lines @@
   // The list of running & un-pinned applications for different users on hidden
   // desktops.
   typedef std::vector<std::string> RunningAppListIds;
   typedef std::map<std::string, RunningAppListIds> RunningAppListIdMap;
   RunningAppListIdMap last_used_running_application_order_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeLauncherController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_CHROME_LAUNCHER_CONTROLLER_H_