Enable NetProxyPreconnects experiment by default

components/network_session_configurator/network_session_configurator.cc

Index: components/network_session_configurator/network_session_configurator.cc
diff --git a/components/network_session_configurator/network_session_configurator.cc b/components/network_session_configurator/network_session_configurator.cc
index da1537cf7bfb45b3cb42b6af513e929cddccb666..b06afa19760fd7222b968093a564d90e02de1c5e 100644
--- a/components/network_session_configurator/network_session_configurator.cc
+++ b/components/network_session_configurator/network_session_configurator.cc
@@ -321,14 +321,6 @@ void ConfigureQuicParams(base::StringPiece quic_trial_group,
   }
 }
 
-void ConfigureOptimizePreconnectsToProxiesParams(
-    const std::map<std::string, std::string>& proxy_preconnects_trial_params,
-    net::HttpNetworkSession::Params* params) {
-  params->restrict_to_one_preconnect_for_proxies =
-      GetVariationParam(proxy_preconnects_trial_params,
-                        "restrict_to_one_preconnect_for_proxies") == "true";
-}
-
 }  // anonymous namespace
 
 namespace network_session_configurator {
@@ -369,12 +361,6 @@ void ParseFieldTrials(bool is_quic_force_disabled,
   const std::string tfo_trial_group =
       base::FieldTrialList::FindFullName(kTCPFastOpenFieldTrialName);
   ConfigureTCPFastOpenParams(tfo_trial_group, params);
-
-  std::map<std::string, std::string> proxy_preconnects_trial_params;
-  variations::GetVariationParams("NetProxyPreconnects",
-                                 &proxy_preconnects_trial_params);
-  ConfigureOptimizePreconnectsToProxiesParams(proxy_preconnects_trial_params,
-                                              params);
 }
 
 }  // namespace network_session_configurator