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

net/http/http_proxy_client_socket.cc

 // Copyright (c) 2010 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.
 
 #include "net/http/http_proxy_client_socket.h"
 
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/auth.h"
@@ skipping 147 matching lines @@
 }
 
 bool HttpProxyClientSocket::UsingTCPFastOpen() const {
   if (transport_.get() && transport_->socket()) {
     return transport_->socket()->UsingTCPFastOpen();
   }
   NOTREACHED();
   return false;
 }
 
+int64 HttpProxyClientSocket::NumBytesRead() const {
+  if (transport_.get() && transport_->socket()) {
+    return transport_->socket()->NumBytesRead();
+  }
+  NOTREACHED();
+  return -1;
+}
+
+int HttpProxyClientSocket::GetConnectTimeMicros() const {
+  if (transport_.get() && transport_->socket()) {
+    return transport_->socket()->GetConnectTimeMicros();
+  }
+  NOTREACHED();
+  return -1;
+}
+
 int HttpProxyClientSocket::Read(IOBuffer* buf, int buf_len,
                                 CompletionCallback* callback) {
   DCHECK(!user_callback_);
   if (next_state_ != STATE_DONE) {
     // We're trying to read the body of the response but we're still trying
     // to establish an SSL tunnel through the proxy.  We can't read these
     // bytes when establishing a tunnel because they might be controlled by
     // an active network attacker.  We don't worry about this for HTTP
     // because an active network attacker can already control HTTP sessions.
     // We reach this case when the user cancels a 407 proxy auth prompt.
@@ skipping 300 matching lines @@
 
 int HttpProxyClientSocket::DoTCPRestartComplete(int result) {
   if (result != OK)
     return result;
 
   next_state_ = STATE_GENERATE_AUTH_TOKEN;
   return result;
 }
 
 }  // namespace net