Remove the implicit fallback to DIRECT when proxies fail. This better matches...

net/proxy/proxy_info.cc

 // Copyright (c) 2006-2008 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/proxy/proxy_info.h"
 
 namespace net {
 
-ProxyInfo::ProxyInfo()
-    : config_id_(ProxyConfig::INVALID_ID),
-      config_was_tried_(false) {
+ProxyInfo::ProxyInfo() : config_id_(ProxyConfig::INVALID_ID) {
 }
 
 void ProxyInfo::Use(const ProxyInfo& other) {
   proxy_list_ = other.proxy_list_;
 }
 
 void ProxyInfo::UseDirect() {
-  proxy_list_.Set(std::string());
+  proxy_list_.SetSingleProxyServer(ProxyServer::Direct());
 }
 
 void ProxyInfo::UseNamedProxy(const std::string& proxy_uri_list) {
   proxy_list_.Set(proxy_uri_list);
 }
 
 void ProxyInfo::UseProxyServer(const ProxyServer& proxy_server) {
   proxy_list_.SetSingleProxyServer(proxy_server);
 }
 
 std::string ProxyInfo::ToPacString() {
   return proxy_list_.ToPacString();
 }
 
 }  // namespace net