Use OnceCallback on Mojo interfaces in //ash

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

Index: chrome/browser/ui/ash/launcher/arc_playstore_shortcut_launcher_item_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/arc_playstore_shortcut_launcher_item_controller.cc b/chrome/browser/ui/ash/launcher/arc_playstore_shortcut_launcher_item_controller.cc
index e1f1cba48ceb3e9bac594631e64c9585c75ec8e0..292d8c1e0d49cea43b4e735f7d17201725a873a8 100644
--- a/chrome/browser/ui/ash/launcher/arc_playstore_shortcut_launcher_item_controller.cc
+++ b/chrome/browser/ui/ash/launcher/arc_playstore_shortcut_launcher_item_controller.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/ui/ash/launcher/arc_playstore_shortcut_launcher_item_controller.h"
 
+#include <utility>
+
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/chromeos/arc/arc_support_host.h"
 #include "chrome/browser/profiles/profile.h"
@@ -24,7 +26,7 @@ void ArcPlaystoreShortcutLauncherItemController::ItemSelected(
     std::unique_ptr<ui::Event> event,
     int64_t display_id,
     ash::ShelfLaunchSource source,
-    const ItemSelectedCallback& callback) {
+    ItemSelectedCallback callback) {
   if (!playstore_launcher_) {
     // Play Store launch request has never been scheduled.
     std::unique_ptr<ArcAppLauncher> playstore_launcher =
@@ -39,5 +41,5 @@ void ArcPlaystoreShortcutLauncherItemController::ItemSelected(
     if (!playstore_launcher->app_launched())
       playstore_launcher_ = std::move(playstore_launcher);
   }
-  callback.Run(ash::SHELF_ACTION_NONE, base::nullopt);
+  std::move(callback).Run(ash::SHELF_ACTION_NONE, base::nullopt);
 }