Add a GetAlternativeService method to HttpStream to return any

net/http/http_basic_stream.h

Index: net/http/http_basic_stream.h
diff --git a/net/http/http_basic_stream.h b/net/http/http_basic_stream.h
index 4f595c92f8a0417053a536560d1a24565fb1d2d7..cf0d65d2a474c0643e487d80c10ece8a7915461f 100644
--- a/net/http/http_basic_stream.h
+++ b/net/http/http_basic_stream.h
@@ -72,6 +72,9 @@ class NET_EXPORT_PRIVATE HttpBasicStream : public HttpStream {
 
   bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const override;
 
+  bool GetAlternativeService(
+      AlternativeService* alternative_service) const override;
+
   void GetSSLInfo(SSLInfo* ssl_info) override;
 
   void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) override;