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..8170727cb4788200c81dd095d3229087eba847af 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"
@@ -89,6 +90,10 @@ class NET_EXPORT URLRequestContextBuilder {
   URLRequestContextBuilder();
   ~URLRequestContextBuilder();
 
+  static void SetHttpNetworkSessionComponents(

[mmenke, 2015/08/18 18:30:32]

Should have a comment about what it does

[wjmaclean, 2015/08/18 18:55:37]

Done.

+      const URLRequestContext* context,
+      HttpNetworkSession::Params* params);
+
   // These functions are mutually exclusive.  The ProxyConfigService, if
   // set, will be used to construct a ProxyService.
   void set_proxy_config_service(ProxyConfigService* proxy_config_service) {