Remove the "alternate_url" outparam from

net/http/http_stream_factory_impl.h

Index: net/http/http_stream_factory_impl.h
diff --git a/net/http/http_stream_factory_impl.h b/net/http/http_stream_factory_impl.h
index 4d237cefb37e8f472a13df7fdb6357788701a3c2..b7059fce3caa06c80dbdb79499e6c4519d14c221 100644
--- a/net/http/http_stream_factory_impl.h
+++ b/net/http/http_stream_factory_impl.h
@@ -75,8 +75,7 @@ class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
       WebSocketHandshakeStreamBase::CreateHelper* create_helper,
       const BoundNetLog& net_log);
 
-  AlternativeService GetAlternativeServiceRequestFor(const GURL& original_url,
-                                                     GURL* alternate_url);
+  AlternativeService GetAlternativeServiceFor(const GURL& original_url);
 
   // Detaches |job| from |request|.
   void OrphanJob(Job* job, const Request* request);