Revert of Revert of Add a new enable_nonblocking_io field trial param for QUIC

net/quic/quic_stream_factory.h

Index: net/quic/quic_stream_factory.h
diff --git a/net/quic/quic_stream_factory.h b/net/quic/quic_stream_factory.h
index fb083aea2b89d81ad6f189f309023ef061f50213..4ffbac66dbfdf807a9b5eab8f3d413130c9e5aa5 100644
--- a/net/quic/quic_stream_factory.h
+++ b/net/quic/quic_stream_factory.h
@@ -109,6 +109,7 @@
       float load_server_info_timeout_srtt_multiplier,
       bool enable_truncated_connection_ids,
       bool enable_connection_racing,
+      bool enable_non_blocking_io,
       bool disable_disk_cache,
       int socket_receive_buffer_size,
       const QuicTagVector& connection_options);
@@ -331,6 +332,9 @@
   // config from the disk cache.
   bool enable_connection_racing_;
 
+  // Set if experimental non-blocking IO should be used on windows sockets.
+  bool enable_non_blocking_io_;
+
   // Set if we do not want to load server config from the disk cache.
   bool disable_disk_cache_;