Reland rest of r77399.

net/socket/client_socket_pool_base.cc

Index: net/socket/client_socket_pool_base.cc
diff --git a/net/socket/client_socket_pool_base.cc b/net/socket/client_socket_pool_base.cc
index c25f6ab56b6f974cbbecfdd6c9395d32f63e2138..6d5e4105bb4d5f396115398fec6d1b6d7038bd27 100644
--- a/net/socket/client_socket_pool_base.cc
+++ b/net/socket/client_socket_pool_base.cc
@@ -636,6 +636,11 @@ void ClientSocketPoolBaseHelper::RemoveGroup(GroupMap::iterator it) {
 }
 
 // static
+bool ClientSocketPoolBaseHelper::connect_backup_jobs_enabled() {
+  return g_connect_backup_jobs_enabled;
+}
+
+// static
 void ClientSocketPoolBaseHelper::set_connect_backup_jobs_enabled(bool enabled) {
   g_connect_backup_jobs_enabled = enabled;
 }