Race preconnects to HTTP2 proxies that support alternate proxies

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 4e9757f98e2565a5c9f1ce72160e6c800987e3b5..3251f10615cd5f2581f051117c1bb5be07a34e18 100644
--- a/components/network_session_configurator/network_session_configurator.cc
+++ b/components/network_session_configurator/network_session_configurator.cc
@@ -402,6 +402,9 @@ void ConfigureOptimizePreconnectsToProxiesParams(
   params->restrict_to_one_preconnect_for_proxies =
       GetVariationParam(proxy_preconnects_trial_params,
                         "restrict_to_one_preconnect_for_proxies") == "true";
+  params->race_preconnects_to_http2_proxies =
+      GetVariationParam(proxy_preconnects_trial_params,
+                        "race_preconnects_to_http2_proxies") == "true";
 }
 
 }  // anonymous namespace