diff --git a/buffet/device_registration_info.h b/buffet/device_registration_info.h
index b41b55a..dcf54c0 100644
--- a/buffet/device_registration_info.h
+++ b/buffet/device_registration_info.h
@@ -241,6 +241,10 @@
 
   void UpdateDeviceResource(const base::Closure& on_success,
                             const CloudRequestErrorCallback& on_failure);
+  void StartQueuedUpdateDeviceResource();
+  // Success/failure callbacks for UpdateDeviceResource().
+  void OnUpdateDeviceResourceSuccess(const base::DictionaryValue& reply);
+  void OnUpdateDeviceResourceError(const chromeos::Error* error);
 
   void FetchCommands(
       const base::Callback<void(const base::ListValue&)>& on_success,
@@ -314,6 +318,15 @@
   // to the cloud server.
   bool device_state_update_pending_{false};
 
+  using ResourceUpdateCallbackList =
+      std::vector<std::pair<base::Closure, CloudRequestErrorCallback>>;
+  // Success/error callbacks for device resource update request currently in
+  // flight to the cloud server.
+  ResourceUpdateCallbackList in_progress_resource_update_callbacks_;
+  // Success/error callbacks for device resource update requests queued while
+  // another request is in flight to the cloud server.
+  ResourceUpdateCallbackList queued_resource_update_callbacks_;
+
   const bool notifications_enabled_;
   std::unique_ptr<NotificationChannel> primary_notification_channel_;
   std::unique_ptr<PullChannel> pull_channel_;