Show an InfoBar when trying to start Packaged Apps from Metro mode.

apps/app_restore_service.h

Index: apps/app_restore_service.h
diff --git a/apps/app_restore_service.h b/apps/app_restore_service.h
index a308c316f4a78d232968b8614d05e423c020dff8..d4802eb8885ba4a83e3f11032e63807b7e3f6d3d 100644
--- a/apps/app_restore_service.h
+++ b/apps/app_restore_service.h
@@ -21,6 +21,7 @@ struct SavedFileEntry;
 
 }
 
+class ExtensionService;
 class Profile;
 
 using extensions::app_file_handler_util::SavedFileEntry;
@@ -49,6 +50,9 @@ class AppRestoreService : public ProfileKeyedService,
       const extensions::Extension* extension,
       const std::vector<SavedFileEntry>& file_entries);
 
+  void LaunchAppWithId(const std::string& extension_id);
+  void MaybeHandleMetroRelaunch(ExtensionService* extension_service);
+
   content::NotificationRegistrar registrar_;
   Profile* profile_;