Add a GetAlternativeService method to HttpStream to return any
alternative service used for this stream.

Review-Url: https://codereview.chromium.org/2805043004
Cr-Commit-Position: refs/heads/master@{#464163}
diff --git a/net/quic/chromium/quic_http_stream.h b/net/quic/chromium/quic_http_stream.h
index 01d83955..262aeed0 100644
--- a/net/quic/chromium/quic_http_stream.h
+++ b/net/quic/chromium/quic_http_stream.h
@@ -64,6 +64,8 @@
   int64_t GetTotalReceivedBytes() const override;
   int64_t GetTotalSentBytes() const override;
   bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const override;
+  bool GetAlternativeService(
+      AlternativeService* alternative_service) const override;
   void PopulateNetErrorDetails(NetErrorDetails* details) override;
   void SetPriority(RequestPriority priority) override;