Notify NetworkDelegate when bytes have been sent over the network.

net/base/network_delegate.cc

Index: net/base/network_delegate.cc
diff --git a/net/base/network_delegate.cc b/net/base/network_delegate.cc
index 745336f14253305d435e55bcf9abc06f86f6c541..15380281237c1662820d3dee094a9528305d0b01 100644
--- a/net/base/network_delegate.cc
+++ b/net/base/network_delegate.cc
@@ -96,6 +96,13 @@ void NetworkDelegate::NotifyNetworkBytesReceived(const URLRequest& request,
   OnNetworkBytesReceived(request, bytes_received);
 }
 
+void NetworkDelegate::NotifyNetworkBytesSent(const URLRequest& request,
+                                             int64_t bytes_sent) {
+  DCHECK(CalledOnValidThread());
+  DCHECK_GT(bytes_sent, 0);
+  OnNetworkBytesSent(request, bytes_sent);
+}
+
 void NetworkDelegate::NotifyBeforeRedirect(URLRequest* request,
                                            const GURL& new_location) {
   DCHECK(CalledOnValidThread());