Make the proxy server HostPortPair available in document_state so that

content/child/weburlresponse_extradata_impl.h

Index: content/child/weburlresponse_extradata_impl.h
diff --git a/content/child/weburlresponse_extradata_impl.h b/content/child/weburlresponse_extradata_impl.h
index be4d1bc5527c64bdbaa18cecf2c7748cfd0234a8..719b0693c4c05d9e124ec2cf272f3e0df13e1c09 100644
--- a/content/child/weburlresponse_extradata_impl.h
+++ b/content/child/weburlresponse_extradata_impl.h
@@ -35,6 +35,15 @@ class CONTENT_EXPORT WebURLResponseExtraDataImpl :
     was_fetched_via_proxy_ = was_fetched_via_proxy;
   }
 
+  // The proxy server used if this request was loaded via an explicit proxy
+  // (HTTP, SOCKS, etc).
+  net::HostPortPair proxy_server() const {
+    return proxy_server_;
+  }
+  void set_proxy_server(net::HostPortPair proxy_server) {

[bengr, 2014/10/31 15:59:53]

This should probably take a const net::HostPortPair&

+    proxy_server_ = proxy_server;
+  }
+
   /// Flag whether this request was loaded via the SPDY protocol or not.
   // SPDY is an experimental web protocol, see http://dev.chromium.org/spdy
   bool was_fetched_via_spdy() const {
@@ -82,6 +91,7 @@ class CONTENT_EXPORT WebURLResponseExtraDataImpl :
   std::string npn_negotiated_protocol_;
   bool is_ftp_directory_listing_;
   bool was_fetched_via_proxy_;
+  net::HostPortPair proxy_server_;
   bool was_fetched_via_spdy_;
   bool was_npn_negotiated_;
   net::HttpResponseInfo::ConnectionInfo connection_info_;