arc: Fix crash on deferred app launch.

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

Index: chrome/browser/ui/ash/launcher/launcher_item_controller.h
diff --git a/chrome/browser/ui/ash/launcher/launcher_item_controller.h b/chrome/browser/ui/ash/launcher/launcher_item_controller.h
index 57c2352def3cbb60c887f96f62c400d1a3c13253..81d1c327a5798ca6968308764627fa68af97c9ed 100644
--- a/chrome/browser/ui/ash/launcher/launcher_item_controller.h
+++ b/chrome/browser/ui/ash/launcher/launcher_item_controller.h
@@ -56,6 +56,9 @@ class LauncherItemController : public ash::mojom::ShelfItemDelegate {
   // Returns nullptr if class is not AppWindowLauncherItemController.
   virtual AppWindowLauncherItemController* AsAppWindowLauncherItemController();
 
+  // Returns true if controller represents a shortcut.
+  virtual bool IsShortcut() const;
+
  private:
   // The application id; empty if there is no app associated with the item.
   const std::string app_id_;