Implement upload progress handling in Mojo loading

content/child/url_loader_client_impl.cc

Index: content/child/url_loader_client_impl.cc
diff --git a/content/child/url_loader_client_impl.cc b/content/child/url_loader_client_impl.cc
index 59d29623ed5084c2f9438a098592ddfe63f2c99f..3a0ea0d9fc98c6b46e11fbaef055c7d84b49cc12 100644
--- a/content/child/url_loader_client_impl.cc
+++ b/content/child/url_loader_client_impl.cc
@@ -181,4 +181,12 @@ void URLLoaderClientImpl::Dispatch(const IPC::Message& message) {
   }
 }
 
+void URLLoaderClientImpl::OnUploadProgress(int64_t current_position,
+                                           int64_t total_size,
+                                           const base::Closure& ack_callback) {
+  resource_dispatcher_->OnMessageReceived(
+      ResourceMsg_UploadProgress(request_id_, current_position, total_size));
+  ack_callback.Run();
+}
+
 }  // namespace content