Deprecate FLAGS_quic_close_stream_after_writing_queued_data

net/quic/core/quic_spdy_stream.cc

Index: net/quic/core/quic_spdy_stream.cc
diff --git a/net/quic/core/quic_spdy_stream.cc b/net/quic/core/quic_spdy_stream.cc
index a6323cb2a4ac1f6204704bffe46d40a712f51b5c..0747b8e44e45aad8302fc3f369eaff6a823e435d 100644
--- a/net/quic/core/quic_spdy_stream.cc
+++ b/net/quic/core/quic_spdy_stream.cc
@@ -359,8 +359,7 @@ void QuicSpdyStream::OnCanWrite() {
   ReliableQuicStream::OnCanWrite();
 
   // Trailers (and hence a FIN) may have been sent ahead of queued body bytes.
-  if (FLAGS_quic_close_stream_after_writing_queued_data && !HasBufferedData() &&
-      fin_sent()) {
+  if (!HasBufferedData() && fin_sent()) {
     CloseWriteSide();
   }
 }