Notify NetworkDelegate when bytes have been received 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 "base/strings/string16.h"
 #include "net/base/completion_callback.h"
 #include "net/base/network_delegate.h"
@@ skipping 100 matching lines @@
   // |new_location| is only valid until OnURLRequestDestroyed is called for this
   // request.
   void OnBeforeRedirect(URLRequest* request, const GURL& new_location) override;
 
   // This corresponds to URLRequestDelegate::OnResponseStarted.
   void OnResponseStarted(URLRequest* request) override;
 
   // Called every time we read raw bytes.
   void OnRawBytesRead(const URLRequest& request, int bytes_read) override;
 
+  // Called when bytes are received from the network, such as after receiving
+  // headers or reading raw response bytes. |bytes_received| is the number of
+  // bytes measured at the application layer that have been received over the
+  // network since the last time OnNetworkBytesReceived was called.
+  // |bytes_received| will always be greater than 0.
+  void OnNetworkBytesReceived(const URLRequest& request,
+                              int64 bytes_received) 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 62 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_