Use common code to set HttpNetworkSession::Param pointers.

net/url_request/url_request_context_builder.h

Index: net/url_request/url_request_context_builder.h
diff --git a/net/url_request/url_request_context_builder.h b/net/url_request/url_request_context_builder.h
index 6e614dc6f95d2ed9c6a2cd2d309c1760401d081c..ad3d2cff5097edac2c77a30941a3f702fd289348 100644
--- a/net/url_request/url_request_context_builder.h
+++ b/net/url_request/url_request_context_builder.h
@@ -26,6 +26,7 @@
 #include "net/base/net_export.h"
 #include "net/base/network_delegate.h"
 #include "net/dns/host_resolver.h"
+#include "net/http/http_network_session.h"
 #include "net/proxy/proxy_config_service.h"
 #include "net/proxy/proxy_service.h"
 #include "net/quic/quic_protocol.h"
@@ -86,6 +87,10 @@ class NET_EXPORT URLRequestContextBuilder {
     QuicTagVector quic_connection_options;
   };
 
+  static void SetHttpNetworkSessionComponents(
+      HttpNetworkSession::Params* params,
+      URLRequestContext* context);
+
   URLRequestContextBuilder();
   ~URLRequestContextBuilder();