Remove obsolete QUIC disabling code.

net/url_request/url_request_context_builder.cc

Index: net/url_request/url_request_context_builder.cc
diff --git a/net/url_request/url_request_context_builder.cc b/net/url_request/url_request_context_builder.cc
index 4da1a7324a21cc73b0ce05a8c2e50427a1a99451..9c6dea348ea9c3901342055ceb1e5e51df02a9ac 100644
--- a/net/url_request/url_request_context_builder.cc
+++ b/net/url_request/url_request_context_builder.cc
@@ -188,9 +188,7 @@ URLRequestContextBuilder::HttpNetworkSessionParams::HttpNetworkSessionParams()
       enable_quic(false),
       quic_max_server_configs_stored_in_properties(0),
       quic_delay_tcp_race(true),
-      quic_max_number_of_lossy_connections(0),
       quic_prefer_aes(false),
-      quic_packet_loss_threshold(1.0f),
       quic_idle_connection_timeout_seconds(kIdleConnectionTimeoutSeconds),
       quic_close_sessions_on_ip_change(false),
       quic_migrate_sessions_on_network_change(false),
@@ -428,10 +426,6 @@ std::unique_ptr<URLRequestContext> URLRequestContextBuilder::Build() {
       http_network_session_params_.quic_max_server_configs_stored_in_properties;
   network_session_params.quic_delay_tcp_race =
       http_network_session_params_.quic_delay_tcp_race;
-  network_session_params.quic_max_number_of_lossy_connections =
-      http_network_session_params_.quic_max_number_of_lossy_connections;
-  network_session_params.quic_packet_loss_threshold =
-      http_network_session_params_.quic_packet_loss_threshold;
   network_session_params.quic_idle_connection_timeout_seconds =
       http_network_session_params_.quic_idle_connection_timeout_seconds;
   network_session_params.quic_connection_options =