Remove unused LauncherItemController::IsVisible()

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

Index: chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.cc b/chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.cc
index fa22849f1bb93f665595f9bfed54f49449933b8c..940bdb1ec0a58c73a30b4be9f86a1fb858bb8aca 100644
--- a/chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.cc
+++ b/chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.cc
@@ -69,15 +69,6 @@ void AppWindowLauncherItemController::SetActiveWindow(aura::Window* 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);