arc: Dont sync app list change caused by Arc opt out.

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

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h
index 5dd7ef121da59b4d8d5e03c3d7cd1123b075980c..cf4550f196d434426f38718b74195538a200ef45 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h
@@ -211,7 +211,7 @@ class ChromeLauncherControllerImpl
   // Internal helpers for pinning and unpinning that handle both
   // client-triggered and internal pinning operations.
   void DoPinAppWithID(const std::string& app_id);
-  void DoUnpinAppWithID(const std::string& app_id);
+  void DoUnpinAppWithID(const std::string& app_id, bool update_prefs);
 
   // Pin a running app with |shelf_id| internally to |index|. It returns
   // the index where the item was pinned.
@@ -309,6 +309,10 @@ class ChromeLauncherControllerImpl
   // app_list::AppListSyncableService::Observer:
   void OnSyncModelUpdated() override;
 
+  // Unpins shelf item and optionally updates pin prefs when |update_prefs| is
+  // set to true.
+  void UnpinAndUpdatePrefs(ash::ShelfID id, bool update_prefs);
+
   ash::ShelfModel* model_;
 
   // Profile used for prefs and loading extensions. This is NOT necessarily the