Enable NetProxyPreconnects experiment by default

components/network_session_configurator/network_session_configurator.cc

 // Copyright 2016 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.
 
 #include "components/network_session_configurator/network_session_configurator.h"
 
 #include <map>
 #include <unordered_set>
 
 #include "base/metrics/field_trial.h"
@@ skipping 303 matching lines @@
   params->quic_user_agent_id = quic_user_agent_id;
 
   net::QuicVersion version = GetQuicVersion(quic_trial_params);
   if (version != net::QUIC_VERSION_UNSUPPORTED) {
     net::QuicVersionVector supported_versions;
     supported_versions.push_back(version);
     params->quic_supported_versions = supported_versions;
   }
 }
 
-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 {
 
 net::QuicVersion ParseQuicVersion(const std::string& quic_version) {
   net::QuicVersionVector supported_versions = net::AllSupportedVersions();
   for (size_t i = 0; i < supported_versions.size(); ++i) {
     net::QuicVersion version = supported_versions[i];
     if (net::QuicVersionToString(version) == quic_version) {
       return version;
@@ skipping 23 matching lines @@
                                       &http2_trial_params))
     http2_trial_params.clear();
   ConfigureHttp2Params(http2_trial_group, http2_trial_params, params);
 
   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);

[xunjieli, 2017/04/28 14:24:30]

Can we get rid of line 365 - 367?

[tbansal1, 2017/04/28 16:36:08]

Good catch. Done.

-  ConfigureOptimizePreconnectsToProxiesParams(proxy_preconnects_trial_params,
-                                              params);
 }
 
 }  // namespace network_session_configurator