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 04aee613ace7c63b19db4b3b8c5f995f9cf9ba30..00886e686ead3300ea1a8d6c10645e1bf6912a7e 100644
--- a/content/child/url_loader_client_impl.cc
+++ b/content/child/url_loader_client_impl.cc
@@ -174,4 +174,13 @@ 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