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

net/socket/tcp_client_socket_win.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_SOCKET_TCP_CLIENT_SOCKET_WIN_H_
 #define NET_SOCKET_TCP_CLIENT_SOCKET_WIN_H_
 #pragma once
 
 #include <winsock2.h>
 
+#include "base/time.h"
 #include "base/threading/non_thread_safe.h"
 #include "net/base/address_list.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_log.h"
 #include "net/socket/stream_socket.h"
 
 namespace net {
 
 class BoundNetLog;
 
@@ skipping 22 matching lines @@
   virtual bool IsConnected() const;
   virtual bool IsConnectedAndIdle() const;
   virtual int GetPeerAddress(AddressList* address) const;
   virtual int GetLocalAddress(IPEndPoint* address) const;
   virtual const BoundNetLog& NetLog() const { return net_log_; }
   virtual void SetSubresourceSpeculation();
   virtual void SetOmniboxSpeculation();
   virtual bool WasEverUsed() const;
   virtual bool UsingTCPFastOpen() const;
 
+  virtual int NumBytesRead() const { return num_bytes_read_; }
+  virtual double GetRTTInMs() const { return rtt_ms_; }
+
   // Socket methods:
   // Multiple outstanding requests are not supported.
   // Full duplex mode (reading and writing at the same time) is supported
   virtual int Read(IOBuffer* buf, int buf_len, CompletionCallback* callback);
   virtual int Write(IOBuffer* buf, int buf_len, CompletionCallback* callback);
 
   virtual bool SetReceiveBufferSize(int32 size);
   virtual bool SetSendBufferSize(int32 size);
 
  private:
@@ skipping 66 matching lines @@
 
   BoundNetLog net_log_;
 
   // This socket was previously disconnected and has not been re-connected.
   bool previously_disconnected_;
 
   // Record of connectivity and transmissions, for use in speculative connection
   // histograms.
   UseHistory use_history_;
 
+  base::Time connect_start_time_;
+  int num_bytes_read_;
+  double rtt_ms_;
+
   DISALLOW_COPY_AND_ASSIGN(TCPClientSocketWin);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_CLIENT_SOCKET_WIN_H_