Alternate-Protocol was failing when going through Digest authenticating proxy.

net/socket/socket_test_util.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/socket/socket_test_util.h"
 
 #include <algorithm>
 #include <vector>
 
 
@@ skipping 169 matching lines @@
       pending_buf_len_(0),
       pending_callback_(NULL) {
   DCHECK(data_);
   data_->Reset();
 }
 
 int MockTCPClientSocket::Connect(net::CompletionCallback* callback) {
   if (connected_)
     return net::OK;
   connected_ = true;
+  peer_closed_connection_ = false;
   if (data_->connect_data().async) {
     RunCallbackAsync(callback, data_->connect_data().result);
     return net::ERR_IO_PENDING;
   }
   return data_->connect_data().result;
 }
 
 void MockTCPClientSocket::Disconnect() {
   MockClientSocket::Disconnect();
   pending_callback_ = NULL;
@@ skipping 694 matching lines @@
 
 const char kSOCKS5OkRequest[] =
     { 0x05, 0x01, 0x00, 0x03, 0x04, 'h', 'o', 's', 't', 0x00, 0x50 };
 const int kSOCKS5OkRequestLength = arraysize(kSOCKS5OkRequest);
 
 const char kSOCKS5OkResponse[] =
     { 0x05, 0x00, 0x00, 0x01, 127, 0, 0, 1, 0x00, 0x50 };
 const int kSOCKS5OkResponseLength = arraysize(kSOCKS5OkResponse);
 
 }  // namespace net