Always send queued retransmission packets, because of write blocked socket, once the socket gets un…

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index 8e364e1fdfd5f2b803d3fd3dfe18162aa47a9aca..17d2442408a986f7fbaaf076742224f9ae991570 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -1737,6 +1737,13 @@ bool QuicConnection::ShouldDiscardPacket(const SerializedPacket& packet) {
     return true;
   }
 
+  // TODO(fayang): Remove IsUnacked and HasRetransmittableFrames from
+  // QuicSentPacketManagerInterface when deprecating
+  // gfe2_reloadable_flag_quic_always_write_queued_retransmissions.
+  if (FLAGS_quic_always_write_queued_retransmissions) {
+    return false;
+  }
+
   // If a retransmission has been acked before sending, don't send it.
   // This occurs if a packet gets serialized, queued, then discarded.
   if (packet.transmission_type != NOT_RETRANSMISSION &&