Remove update icon after user confirms download

chromeos/dbus/update_engine_client.h

Index: chromeos/dbus/update_engine_client.h
diff --git a/chromeos/dbus/update_engine_client.h b/chromeos/dbus/update_engine_client.h
index 5206aa6e722b8553742d6dee27324f650de77430..113bfde27407ffe6f8749aecf040987bfa7d0e89 100644
--- a/chromeos/dbus/update_engine_client.h
+++ b/chromeos/dbus/update_engine_client.h
@@ -73,6 +73,9 @@ class CHROMEOS_EXPORT UpdateEngineClient : public DBusClient {
 
     // Called when the status is updated.
     virtual void UpdateStatusChanged(const Status& status) {}
+
+    // Called when the update over cellular target is set.
+    virtual void OnUpdateOverCellularTargetSet(bool success) {}
   };
 
   ~UpdateEngineClient() override;