Deciding best connection to schedule requests on based on cwnd and idle time

net/http/http_network_transaction.h

 // Copyright (c) 2011 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_HTTP_HTTP_NETWORK_TRANSACTION_H_
 #define NET_HTTP_HTTP_NETWORK_TRANSACTION_H_
 #pragma once
 
 #include <string>
 
@@ skipping 128 matching lines @@
   int DoDrainBodyForAuthRestartComplete(int result);
 
   void BuildRequestHeaders(bool using_proxy);
 
   // Record histogram of time until first byte of header is received.
   void LogTransactionConnectedMetrics();
 
   // Record histogram of latency (durations until last byte received).
   void LogTransactionMetrics() const;
 
+  // Record histogram of number of round trips taken to download the full
+  // response body vs bytes transferred.
+  void LogNumRttVsBytesMetrics() const;
+
   // Writes a log message to help debugging in the field when we block a proxy
   // response to a CONNECT request.
   void LogBlockedTunnelResponse(int response_code) const;
 
   // Called to handle a client certificate request.
   int HandleCertificateRequest(int error);
 
   // Called to possibly recover from an SSL handshake error.  Sets next_state_
   // and returns OK if recovering from the error.  Otherwise, the same error
   // code is returned.
@@ skipping 109 matching lines @@
   // True when the tunnel is in the process of being established - we can't
   // read from the socket until the tunnel is done.
   bool establishing_tunnel_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpNetworkTransaction);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_NETWORK_TRANSACTION_H_