Fix cannot select and activate pinned v2app through launcher context menu

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

Index: chrome/browser/ui/ash/launcher/launcher_item_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/launcher_item_controller.cc b/chrome/browser/ui/ash/launcher/launcher_item_controller.cc
index aba8fe133a5676e6fe6f7455633ea97ff44e7f33..99f4b11adb35f883d06c5ee5e28244b3a1d9a412 100644
--- a/chrome/browser/ui/ash/launcher/launcher_item_controller.cc
+++ b/chrome/browser/ui/ash/launcher/launcher_item_controller.cc
@@ -19,3 +19,8 @@ LauncherItemController::LauncherItemController(
       image_set_by_controller_(false) {}
 
 LauncherItemController::~LauncherItemController() {}
+
+AppWindowLauncherItemController*
+LauncherItemController::AsAppWindowLauncherItemController() {
+  return nullptr;
+}