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

net/http/http_stream_factory_impl_job_controller.h

Index: net/http/http_stream_factory_impl_job_controller.h
diff --git a/net/http/http_stream_factory_impl_job_controller.h b/net/http/http_stream_factory_impl_job_controller.h
index 76a70e1aa7333e516c6b55f161925f6d3374f44d..20956c43812e24fc9372a7032ecdef8573fcf2b2 100644
--- a/net/http/http_stream_factory_impl_job_controller.h
+++ b/net/http/http_stream_factory_impl_job_controller.h
@@ -163,6 +163,8 @@ class HttpStreamFactoryImpl::JobController
 
   const NetLogWithSource* GetNetLog() const override;
 
+  const QuicVersionVector& GetAdvertisedQuicVersions() const override;
+
   void MaybeSetWaitTimeForMainJob(const base::TimeDelta& delay) override;
 
   WebSocketHandshakeStreamBase::CreateHelper*
@@ -321,7 +323,7 @@ class HttpStreamFactoryImpl::JobController
   std::unique_ptr<Job> alternative_job_;
   // The alternative service used by |alternative_job_|
   // (or by |main_job_| if |is_preconnect_|.)
-  AlternativeService alternative_service_;
+  AlternativeServiceInfo alternative_service_info_;
 
   // Net error code of the failed alternative job. Set to OK by default.
   int alternative_job_net_error_;