arc: Add package app list updated event.

chrome/browser/ui/app_list/arc/arc_app_list_prefs.h

Index: chrome/browser/ui/app_list/arc/arc_app_list_prefs.h
diff --git a/chrome/browser/ui/app_list/arc/arc_app_list_prefs.h b/chrome/browser/ui/app_list/arc/arc_app_list_prefs.h
index e1ce1d86932144b8f265f0fb892d2d1d969daf78..06de46b32ca8c5e804bbe91a2c9b05d6af152114 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_list_prefs.h
+++ b/chrome/browser/ui/app_list/arc/arc_app_list_prefs.h
@@ -228,7 +228,10 @@ class ArcAppListPrefs
 
   // arc::mojom::AppHost:
   void OnAppListRefreshed(mojo::Array<arc::mojom::AppInfoPtr> apps) override;
-  void OnAppAdded(arc::mojom::AppInfoPtr app) override;
+  void OnAppAddedDeprecated(arc::mojom::AppInfoPtr app) override;
+  void OnPackageAppListRefreshed(
+      const mojo::String& package_name,
+      mojo::Array<arc::mojom::AppInfoPtr> apps) override;
   void OnInstallShortcut(arc::mojom::ShortcutInfoPtr app) override;
   void OnPackageRemoved(const mojo::String& package_name) override;
   void OnAppIcon(const mojo::String& package_name,
@@ -278,6 +281,8 @@ class ArcAppListPrefs
   void OnIconInstalled(const std::string& app_id,
                        ui::ScaleFactor scale_factor,
                        bool install_succeed);
+  std::set<std::string> GetAppsForPackage(
+      const std::string& package_name) const;
 
   Profile* const profile_;