Warmth of a connection (cwnd) is estimated by the amount of data written to the socket.

Choosing the warmest connection would mean faster resource load times. 

idle time is the time a socket has remained idle (no http requests being served on it). 
Probability of server resetting a connection increases with idle time duration. 

Using a cost function that takes into account bytes transferred and idle time to pick best connection to schedule http requests on.

CODEREVIEW done in http://codereview.chromium.org/6990036/

Contributed by gagansingh@google.com

Review URL: http://codereview.chromium.org/7189055

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@90373 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 16 insertions, 0 deletions

diff --git a/net/socket/ssl_client_socket_mac.cc b/net/socket/ssl_client_socket_mac.cc
index 2fc11ec..c38b78a 100644
--- a/net/socket/ssl_client_socket_mac.cc
+++ b/net/socket/ssl_client_socket_mac.cc
@@ -658,6 +658,22 @@ bool SSLClientSocketMac::UsingTCPFastOpen() const {
   return false;
 }
 
+int64 SSLClientSocketMac::NumBytesRead() const {
+  if (transport_.get() && transport_->socket()) {
+    return transport_->socket()->NumBytesRead();
+  }
+  NOTREACHED();
+  return -1;
+}
+
+base::TimeDelta SSLClientSocketMac::GetConnectTimeMicros() const {
+  if (transport_.get() && transport_->socket()) {
+    return transport_->socket()->GetConnectTimeMicros();
+  }
+  NOTREACHED();
+  return base::TimeDelta::FromMicroseconds(-1);
+}
+
 int SSLClientSocketMac::Read(IOBuffer* buf, int buf_len,
                              CompletionCallback* callback) {
   DCHECK(completed_handshake());