Add a GetAlternativeService method to HttpStream to return any

net/websockets/websocket_basic_handshake_stream.cc

Index: net/websockets/websocket_basic_handshake_stream.cc
diff --git a/net/websockets/websocket_basic_handshake_stream.cc b/net/websockets/websocket_basic_handshake_stream.cc
index efe263ade36260b78282ff75e5d3444716147d3f..c67eb4a838c236d2d4a651cd31ab5087ce73cd73 100644
--- a/net/websockets/websocket_basic_handshake_stream.cc
+++ b/net/websockets/websocket_basic_handshake_stream.cc
@@ -420,6 +420,11 @@ int64_t WebSocketBasicHandshakeStream::GetTotalSentBytes() const {
   return 0;
 }
 
+bool WebSocketBasicHandshakeStream::GetAlternativeService(
+    AlternativeService* alternative_service) const {
+  return false;
+}
+
 bool WebSocketBasicHandshakeStream::GetLoadTimingInfo(
     LoadTimingInfo* load_timing_info) const {
   return state_.connection()->GetLoadTimingInfo(IsConnectionReused(),