Remove unused LauncherItemController::IsVisible()

chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.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_ASH_LAUNCHER_APP_SHORTCUT_LAUNCHER_ITEM_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_APP_SHORTCUT_LAUNCHER_ITEM_CONTROLLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 23 matching lines @@
   ~AppShortcutLauncherItemController() override;
 
   static AppShortcutLauncherItemController* Create(
       const std::string& app_id,
       const std::string& launch_id,
       ChromeLauncherController* controller);
 
   std::vector<content::WebContents*> GetRunningApplications();
 
   // LauncherItemController overrides:
-  bool IsVisible() const override;
   void Launch(ash::LaunchSource source, int event_flags) override;
   ash::ShelfItemDelegate::PerformedAction Activate(
       ash::LaunchSource source) override;
   ChromeLauncherAppMenuItems GetApplicationList(int event_flags) override;
   ash::ShelfItemDelegate::PerformedAction ItemSelected(
       const ui::Event& event) override;
   ash::ShelfMenuModel* CreateApplicationMenu(int event_flags) override;
   void Close() override;
 
   // Get the refocus url pattern, which can be used to identify this application
@@ skipping 43 matching lines @@
   // Since V2 applications can be undetectable after launching, this timer is
   // keeping track of the last launch attempt.
   base::Time last_launch_attempt_;
 
   ChromeLauncherController* chrome_launcher_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(AppShortcutLauncherItemController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_APP_SHORTCUT_LAUNCHER_ITEM_CONTROLLER_H_