After draining the body of a 401/407 response, verify that...

net/http/http_network_transaction.cc

 // Copyright (c) 2006-2009 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_network_transaction.h"
 
 #include "base/scoped_ptr.h"
 #include "base/compiler_specific.h"
 #include "base/field_trial.h"
 #include "base/histogram.h"
@@ skipping 258 matching lines @@
     }
     keep_alive = true;
   }
 
   // We don't need to drain the response body, so we act as if we had drained
   // the response body.
   DidDrainBodyForAuthRestart(keep_alive);
 }
 
 void HttpNetworkTransaction::DidDrainBodyForAuthRestart(bool keep_alive) {
-  if (keep_alive) {
+  if (keep_alive && connection_.socket()->IsConnectedAndIdle()) {
+    // We should call connection_.set_idle_time(), but this doesn't occur
+    // often enough to be worth the trouble.
     next_state_ = STATE_SEND_REQUEST;
+    connection_.set_is_reused(true);
     reused_socket_ = true;
   } else {
     next_state_ = STATE_INIT_CONNECTION;
     connection_.socket()->Disconnect();
     connection_.Reset();
   }
 
   // Reset the other member variables.
   ResetStateForRestart();
 }
@@ skipping 1371 matching lines @@
   AuthChallengeInfo* auth_info = new AuthChallengeInfo;
   auth_info->is_proxy = target == HttpAuth::AUTH_PROXY;
   auth_info->host_and_port = ASCIIToWide(GetHostAndPort(auth_origin));
   auth_info->scheme = ASCIIToWide(auth_handler_[target]->scheme());
   // TODO(eroman): decode realm according to RFC 2047.
   auth_info->realm = ASCIIToWide(auth_handler_[target]->realm());
   http_stream_->GetResponseInfo()->auth_challenge = auth_info;
 }
 
 }  // namespace net