Notify NetworkDelegate when bytes have been sent over the network.

net/url_request/url_request_test_util.cc

Index: net/url_request/url_request_test_util.cc
diff --git a/net/url_request/url_request_test_util.cc b/net/url_request/url_request_test_util.cc
index af8d139e64b2738aa08996e88cf80720fc43d720..cc4687895d737a1655de7495daef0cd25b464778 100644
--- a/net/url_request/url_request_test_util.cc
+++ b/net/url_request/url_request_test_util.cc
@@ -330,6 +330,7 @@ TestNetworkDelegate::TestNetworkDelegate()
       before_send_headers_count_(0),
       headers_received_count_(0),
       total_network_bytes_received_(0),
+      total_network_bytes_sent_(0),
       has_load_timing_info_before_redirect_(false),
       has_load_timing_info_before_auth_(false),
       can_access_files_(true),
@@ -426,6 +427,12 @@ void TestNetworkDelegate::OnSendHeaders(
   will_be_intercepted_on_next_error_ = false;
 }
 
+void TestNetworkDelegate::OnNetworkBytesSent(const URLRequest& request,
+                                             int64_t bytes_sent) {
+  event_order_[request.identifier()] += "OnNetworkBytesSent\n";
+  total_network_bytes_sent_ += bytes_sent;
+}
+
 int TestNetworkDelegate::OnHeadersReceived(
     URLRequest* request,
     const CompletionCallback& callback,