Add a new prefer_aes finch options for QUIC.

net/http/http_network_session.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_HTTP_HTTP_NETWORK_SESSION_H_
 #define NET_HTTP_HTTP_NETWORK_SESSION_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 97 matching lines @@
     bool enable_quic;
     bool disable_insecure_quic;
     bool enable_quic_for_proxies;
     bool enable_quic_port_selection;
     bool quic_always_require_handshake_confirmation;
     bool quic_disable_connection_pooling;
     float quic_load_server_info_timeout_srtt_multiplier;
     bool quic_enable_connection_racing;
     bool quic_enable_non_blocking_io;
     bool quic_disable_disk_cache;
+    bool quic_prefer_aes;
     int quic_max_number_of_lossy_connections;
     float quic_packet_loss_threshold;
     int quic_socket_receive_buffer_size;
     HostPortPair origin_to_force_quic_on;
     QuicClock* quic_clock;  // Will be owned by QuicStreamFactory.
     QuicRandom* quic_random;
     size_t quic_max_packet_length;
     std::string quic_user_agent_id;
     bool enable_user_alternate_protocol_ports;
     QuicCryptoClientStreamFactory* quic_crypto_client_stream_factory;
@@ skipping 110 matching lines @@
 
   NextProtoVector next_protos_;
   bool enabled_protocols_[NUM_VALID_ALTERNATE_PROTOCOLS];
 
   Params params_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_NETWORK_SESSION_H_