Remove unused LauncherItemController::IsVisible()

chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl_unittest.cc

 // 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.
 
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 238 matching lines @@
 // Test implementation of a V2 app launcher item controller.
 class TestV2AppLauncherItemController : public LauncherItemController {
  public:
   TestV2AppLauncherItemController(const std::string& app_id,
                                   ChromeLauncherController* controller)
       : LauncherItemController(app_id, "", controller) {}
 
   ~TestV2AppLauncherItemController() override {}
 
   // Override for LauncherItemController:
-  bool IsVisible() const override { return true; }
   void Launch(ash::LaunchSource source, int event_flags) override {}
   ash::ShelfItemDelegate::PerformedAction Activate(
       ash::LaunchSource source) override {
     return kExistingWindowActivated;
   }
   void Close() override {}
   ash::ShelfItemDelegate::PerformedAction ItemSelected(
       const ui::Event& event) override {
     return kExistingWindowActivated;
   }
@@ skipping 3794 matching lines @@
 
   // Pinned state should not change.
   EXPECT_EQ("AppList, Chrome, App1, App2", GetPinnedAppStatus());
   launcher_controller_->UnpinAppWithID(extension2_->id());
   EXPECT_EQ("AppList, Chrome, App1", GetPinnedAppStatus());
 
   // Resume syncing and sync information overrides local copy.
   StartAppSyncService(copy_sync_list);
   EXPECT_EQ("AppList, Chrome, App1, App2", GetPinnedAppStatus());
 }