mash: Remove shelf app menu item objects.

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 631e530a956c586a13f9f3e7f2febe717d68d11e..36ac6a8b3c0ad0a26ba22916d295ca82935a5f71 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
@@ -96,9 +96,16 @@ ash::ShelfAction AppWindowLauncherItemController::ItemSelected(
 
 ash::ShelfAppMenuItemList AppWindowLauncherItemController::GetAppMenuItems(
     int event_flags) {
+  // Return an empty item list to avoid showing an application menu.
   return ash::ShelfAppMenuItemList();
 }
 
+void AppWindowLauncherItemController::ExecuteCommand(uint32_t command_id,
+                                                     int event_flags) {
+  // This delegate does not support showing an application menu.
+  NOTIMPLEMENTED();
+}
+
 void AppWindowLauncherItemController::Close() {
   // Note: Closing windows may affect the contents of app_windows_.
   WindowList windows_to_close = windows_;