Add a GetAlternativeService method to HttpStream to return any

net/spdy/spdy_http_stream.cc

Index: net/spdy/spdy_http_stream.cc
diff --git a/net/spdy/spdy_http_stream.cc b/net/spdy/spdy_http_stream.cc
index 8bfc4b7f9fa8341687b1ee15bc974a5e59361cf4..0e07de38cd49f8fc19bde6ea66422d1614e72470 100644
--- a/net/spdy/spdy_http_stream.cc
+++ b/net/spdy/spdy_http_stream.cc
@@ -191,6 +191,11 @@ int64_t SpdyHttpStream::GetTotalSentBytes() const {
   return stream_->raw_sent_bytes();
 }
 
+bool SpdyHttpStream::GetAlternativeService(
+    AlternativeService* alternative_service) const {
+  return false;
+}
+
 bool SpdyHttpStream::GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const {
   if (stream_closed_) {
     if (!closed_stream_has_load_timing_info_)