Add a new prefer_aes finch options for QUIC.

Review URL: https://codereview.chromium.org/1165283004

Cr-Commit-Position: refs/heads/master@{#333805}
diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index c3d1f51d..4b7edeb 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -98,6 +98,7 @@
       quic_enable_connection_racing(false),
       quic_enable_non_blocking_io(false),
       quic_disable_disk_cache(false),
+      quic_prefer_aes(false),
       quic_max_number_of_lossy_connections(0),
       quic_packet_loss_threshold(1.0f),
       quic_socket_receive_buffer_size(kQuicSocketReceiveBufferSize),
@@ -147,6 +148,7 @@
           params.quic_enable_connection_racing,
           params.quic_enable_non_blocking_io,
           params.quic_disable_disk_cache,
+          params.quic_prefer_aes,
           params.quic_max_number_of_lossy_connections,
           params.quic_packet_loss_threshold,
           params.quic_socket_receive_buffer_size,