Change QuicStreamRequest::Request() to take a preferred QuicVersion so that

net/http/http_server_properties.h

Index: net/http/http_server_properties.h
diff --git a/net/http/http_server_properties.h b/net/http/http_server_properties.h
index a11d80222f239b32dcb26f36bfdfb6472df487f3..961544fea01ca83319feb47042cf1873e77c682a 100644
--- a/net/http/http_server_properties.h
+++ b/net/http/http_server_properties.h
@@ -175,6 +175,12 @@ class NET_EXPORT_PRIVATE AlternativeServiceInfo {
     return alternative_service_;
   }
 
+  const NextProto& protocol() const { return alternative_service_.protocol; }

[Bence, 2017/06/28 19:08:58]

NextProto is an enum, might be better to return by value not by reference.

[Zhongyi Shi, 2017/07/05 23:08:59]

Done.

+
+  HostPortPair host_port_pair() const {
+    return alternative_service_.host_port_pair();
+  }
+
   base::Time expiration() const { return expiration_; }
 
   const QuicVersionVector& advertised_versions() const {