Dispatch transfer size update notification on mojo-loading

content/renderer/service_worker/service_worker_context_client.cc

Index: content/renderer/service_worker/service_worker_context_client.cc
diff --git a/content/renderer/service_worker/service_worker_context_client.cc b/content/renderer/service_worker/service_worker_context_client.cc
index c4b51fb99a0920dfd06c7cd1fb8d61bc40513075..ce0bce76bd988f1e27e80e04bd693ffbf3e6dada 100644
--- a/content/renderer/service_worker/service_worker_context_client.cc
+++ b/content/renderer/service_worker/service_worker_context_client.cc
@@ -289,6 +289,10 @@ class ServiceWorkerContextClient::NavigationPreloadRequest final
     NOTREACHED();
   }
 
+  void OnTransferSizeUpdated(int32_t transfer_size_diff) override {
+    NOTREACHED();
+  }
+
   void OnStartLoadingResponseBody(
       mojo::ScopedDataPipeConsumerHandle body) override {
     DCHECK(!body_.is_valid());