Add a new prefer_aes finch options 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 185da1ff563123fa386e191b34dfc4a53c42a414..25e03ea2ad0d595f5cb4fc3ddcf201014dc90a34 100644
--- a/net/quic/quic_stream_factory.h
+++ b/net/quic/quic_stream_factory.h
@@ -115,6 +115,7 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
       bool enable_connection_racing,
       bool enable_non_blocking_io,
       bool disable_disk_cache,
+      bool prefer_aes,
       int max_number_of_lossy_connections,
       float packet_loss_threshold,
       int socket_receive_buffer_size,
@@ -345,6 +346,9 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
   // Set if we do not want to load server config from the disk cache.
   bool disable_disk_cache_;
 
+  // Set if AES-GCM should be preferred, even if there is no hardware support.
+  bool prefer_aes_;
+
   // Set if we want to disable QUIC when there is high packet loss rate.
   // Specifies the maximum number of connections with high packet loss in a row
   // after which QUIC will be disabled.