Make the proxy server HostPortPair available in document_state so that

content/child/web_url_loader_impl.cc

 // Copyright 2014 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.
 
 // An implementation of WebURLLoader in terms of ResourceLoaderBridge.
 
 #include "content/child/web_url_loader_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 830 matching lines @@
   response->setServiceWorkerResponseType(info.response_type_via_service_worker);
   WebURLResponseExtraDataImpl* extra_data =
       new WebURLResponseExtraDataImpl(info.npn_negotiated_protocol);
   response->setExtraData(extra_data);
   extra_data->set_was_fetched_via_spdy(info.was_fetched_via_spdy);
   extra_data->set_was_npn_negotiated(info.was_npn_negotiated);
   extra_data->set_was_alternate_protocol_available(
       info.was_alternate_protocol_available);
   extra_data->set_connection_info(info.connection_info);
   extra_data->set_was_fetched_via_proxy(info.was_fetched_via_proxy);
+  extra_data->set_proxy_server(info.proxy_server);
 
   // If there's no received headers end time, don't set load timing.  This is
   // the case for non-HTTP requests, requests that don't go over the wire, and
   // certain error cases.
   if (!info.load_timing.receive_headers_end.is_null()) {
     WebURLLoadTiming timing;
     PopulateURLLoadTiming(info.load_timing, &timing);
     const TimeTicks kNullTicks;
     timing.setServiceWorkerFetchStart(
         (info.service_worker_fetch_start - kNullTicks).InSecondsF());
@@ skipping 120 matching lines @@
                                          int intra_priority_value) {
   context_->DidChangePriority(new_priority, intra_priority_value);
 }
 
 bool WebURLLoaderImpl::attachThreadedDataReceiver(
     blink::WebThreadedDataReceiver* threaded_data_receiver) {
   return context_->AttachThreadedDataReceiver(threaded_data_receiver);
 }
 
 }  // namespace content