Reland "Propagate information about how ARC apps are launched"

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

Index: chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.h
diff --git a/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.h b/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.h
index a17d7075bf9b525862401da6a429a55d63429139..deae0bbb98f0aaeabc2749aecf5308453fba5f5f 100644
--- a/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.h
+++ b/chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_item_controller.h
@@ -15,17 +15,23 @@
 class ArcAppDeferredLauncherController;
 class ChromeLauncherController;
 
+// ArcAppDeferredLauncherItemController displays the icon of the ARC app that
+// cannot be launched immediately (due to ARC not being ready) on Chrome OS'
+// shelf, with an overlaid spinner to provide visual feedback.
 class ArcAppDeferredLauncherItemController : public LauncherItemController {
  public:
   ArcAppDeferredLauncherItemController(
       const std::string& arc_app_id,
       ChromeLauncherController* controller,
+      int event_flags,
       const base::WeakPtr<ArcAppDeferredLauncherController>& host);
 
   ~ArcAppDeferredLauncherItemController() override;
 
   base::TimeDelta GetActiveTime() const;
 
+  int event_flags() const { return event_flags_; }
+
   // ash::ShelfItemDelegate
   ash::ShelfItemDelegate::PerformedAction ItemSelected(
       const ui::Event& event) override;
@@ -44,6 +50,10 @@ class ArcAppDeferredLauncherItemController : public LauncherItemController {
   ChromeLauncherAppMenuItems GetApplicationList(int event_flags) override;
 
  private:
+  // The flags of the event that caused the ARC app to be activated. These will
+  // be propagated to the launch event once the app is actually launched.
+  const int event_flags_;
+
   base::WeakPtr<ArcAppDeferredLauncherController> host_;
   const base::Time start_time_;