Add a GetAlternativeService method to HttpStream to return any

net/spdy/spdy_http_stream.h

Index: net/spdy/spdy_http_stream.h
diff --git a/net/spdy/spdy_http_stream.h b/net/spdy/spdy_http_stream.h
index 3605f9b102da6c0b632e760ac1d44783a4709c27..8b7a82d7d27147d8be7842f2aefb8ad473321c85 100644
--- a/net/spdy/spdy_http_stream.h
+++ b/net/spdy/spdy_http_stream.h
@@ -74,6 +74,8 @@ class NET_EXPORT_PRIVATE SpdyHttpStream : public SpdyStream::Delegate,
   // not including proxy overhead. Note that some SPDY frames such as pings are
   // not associated with any stream, and are not included in this value.
   int64_t GetTotalSentBytes() const override;
+  bool GetAlternativeService(
+      AlternativeService* alternative_service) const override;
   bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const override;
   bool GetRemoteEndpoint(IPEndPoint* endpoint) override;
   void PopulateNetErrorDetails(NetErrorDetails* details) override;