Cleanup the preconnect to proxy code and Job controller code

net/http/http_stream_factory_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef NET_HTTP_HTTP_STREAM_FACTORY_IMPL_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_IMPL_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 150 matching lines @@
   std::unique_ptr<JobFactory> job_factory_;
 
   // Set of proxy servers that support request priorities to which subsequent
   // preconnects should be skipped.
   std::set<ProxyServer> preconnecting_proxy_servers_;
 
   SpdySessionRequestMap spdy_session_request_map_;
 
   const bool for_websockets_;
 
-  // True if only one preconnect is allowed to proxy servers that support
-  // request priorities.
-  const bool allow_only_one_preconnect_to_proxy_servers_;
-
   DISALLOW_COPY_AND_ASSIGN(HttpStreamFactoryImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_IMPL_H_