Remove unused LauncherItemController::IsVisible()

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

 // Copyright 2014 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/app_window_launcher_item_controller.h"
 
 #include <algorithm>
 
 #include "ash/wm/window_util.h"
 #include "base/memory/ptr_util.h"
@@ skipping 51 matching lines @@
     return *iter;
   return nullptr;
 }
 
 void AppWindowLauncherItemController::SetActiveWindow(aura::Window* window) {
   ui::BaseWindow* app_window = GetAppWindow(window);
   if (app_window)
     last_active_window_ = app_window;
 }
 
-bool AppWindowLauncherItemController::IsVisible() const {
-  // Return true if any windows are visible.
-  for (const auto* window : windows_) {
-    if (window->GetNativeWindow()->IsVisible())
-      return true;
-  }
-  return false;
-}
-
 void AppWindowLauncherItemController::Launch(ash::LaunchSource source,
                                              int event_flags) {
   launcher_controller()->LaunchApp(app_id(), source, ui::EF_NONE);
 }
 
 ash::ShelfItemDelegate::PerformedAction
 AppWindowLauncherItemController::Activate(ash::LaunchSource source) {
   DCHECK(!windows_.empty());
   ui::BaseWindow* window_to_activate =
       last_active_window_ ? last_active_window_ : windows_.back();
@@ skipping 83 matching lines @@
   if (window_to_show->IsActive()) {
     // Coming here, only a single window is active. For keyboard activations
     // the window gets animated.
     AnimateWindow(window_to_show->GetNativeWindow(),
                   wm::WINDOW_ANIMATION_TYPE_BOUNCE);
   } else {
     return ShowAndActivateOrMinimize(window_to_show);
   }
   return kNoAction;
 }