Notify NetworkDelegate when bytes have been sent over the network.

net/base/network_delegate_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_BASE_NETWORK_DELEGATE_IMPL_H_
 #define NET_BASE_NETWORK_DELEGATE_IMPL_H_
 
 #include <stdint.h>
 
 #include "base/strings/string16.h"
@@ skipping 110 matching lines @@
   // headers or reading raw response bytes. This includes localhost requests.
   // |bytes_received| is the number of bytes measured at the application layer
   // that have been received over the network for this request since the last
   // time OnNetworkBytesReceived was called. |bytes_received| will always be
   // greater than 0.
   // Currently, this is only implemented for HTTP transactions, and
   // |bytes_received| does not include TLS overhead or TCP retransmits.
   void OnNetworkBytesReceived(const URLRequest& request,
                               int64_t bytes_received) override;
 
+  // Called when bytes are sent over the network, such as when sending request
+  // headers or uploading request body bytes. This includes localhost requests.
+  // |bytes_sent| is the number of bytes measured at the application layer that
+  // have been sent over the network for this request since the last time
+  // OnNetworkBytesSent was called. |bytes_sent| will always be greater than 0.
+  // Currently, this is only implemented for HTTP transactions, and |bytes_sent|
+  // does not include TLS overhead or TCP retransmits.
+  void OnNetworkBytesSent(const URLRequest& request,
+                          int64_t bytes_sent) override;
+
   // Indicates that the URL request has been completed or failed.
   // |started| indicates whether the request has been started. If false,
   // some information like the socket address is not available.
   void OnCompleted(URLRequest* request, bool started) override;
 
   // Called when an URLRequest is being destroyed. Note that the request is
   // being deleted, so it's not safe to call any methods that may result in
   // a virtual method call.
   void OnURLRequestDestroyed(URLRequest* request) override;
 
@@ skipping 69 matching lines @@
   // header is stripped from the request.
   bool OnCancelURLRequestWithPolicyViolatingReferrerHeader(
       const URLRequest& request,
       const GURL& target_url,
       const GURL& referrer_url) const override;
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_NETWORK_DELEGATE_IMPL_H_