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

net/socket/stream_socket.h

Index: net/socket/stream_socket.h
===================================================================
--- net/socket/stream_socket.h	(revision 86260)
+++ net/socket/stream_socket.h	(working copy)
@@ -16,6 +16,8 @@
 
 class NET_TEST StreamSocket : public Socket {
  public:
+  StreamSocket() : num_bytes_read_(0) {}
+
   virtual ~StreamSocket() {}
 
   // Called to establish a connection.  Returns OK if the connection could be
@@ -79,6 +81,12 @@
   // TCP FastOpen is an experiment with sending data in the TCP SYN packet.
   virtual bool UsingTCPFastOpen() const = 0;
 
+  // Returns the number of bytes successfully written to this socket.

[willchan no longer on Chromium, 2011/06/06 10:57:36]

This should be virtual int NumBytesRead() const = 0;

[Gagan, 2011/06/06 20:27:10]

Done.

+  virtual int NumBytesRead() const { return num_bytes_read_; }
+
+  // Returns the RTT of this socket.
+  virtual double GetRTTMs() const { return rtt_ms_; }

[willchan no longer on Chromium, 2011/06/06 10:57:36]

virtual double GetRTTInMs() const = 0;

[Gagan, 2011/06/06 20:27:10]

Done.

+
  protected:
   // The following class is only used to gather statistics about the history of
   // a socket.  It is only instantiated and used in basic sockets, such as
@@ -126,6 +134,9 @@
   // logging level.
   void LogByteTransfer(const BoundNetLog& net_log, NetLog::EventType event_type,
                        int byte_count, char* bytes) const;
+
+  int num_bytes_read_;

[willchan no longer on Chromium, 2011/06/06 10:57:36]

Don't add any concrete member variables into this abstract interface class.

You want to add these guys into the transport sockets (TCPClientSocketLibevent
and TCPClientSocketWin). Higher level sockets like the HttpProxyClientSocket
should just forward to their underlying sockets.

[Gagan, 2011/06/06 20:27:10]

Done.

+  double rtt_ms_;
 };
 
 }  // namespace net