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

net/http/http_stream_factory_test_util.h

Index: net/http/http_stream_factory_test_util.h
diff --git a/net/http/http_stream_factory_test_util.h b/net/http/http_stream_factory_test_util.h
index 49a3d96d2780ca1fbe4f8e52a93c1073e73c068e..9a84dcce80374b616458b60efeb3c9f68cb3772a 100644
--- a/net/http/http_stream_factory_test_util.h
+++ b/net/http/http_stream_factory_test_util.h
@@ -116,6 +116,7 @@ class MockHttpStreamFactoryImplJob : public HttpStreamFactoryImpl::Job {
                                HostPortPair destination,
                                GURL origin_url,
                                NextProto alternative_protocol,
+                               QuicVersion quic_version,
                                const ProxyServer& alternative_proxy_server,
                                bool enable_ip_based_pooling,
                                NetLog* net_log);
@@ -159,6 +160,7 @@ class TestJobFactory : public HttpStreamFactoryImpl::JobFactory {
       HostPortPair destination,
       GURL origin_url,
       NextProto alternative_protocol,
+      QuicVersion quic_version,
       bool enable_ip_based_pooling,
       NetLog* net_log) override;