Add config to prune TURN ports

webrtc/p2p/base/portallocator.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 14 matching lines @@
       ice_ufrag_(ice_ufrag),
       ice_pwd_(ice_pwd) {
   // Pooled sessions are allowed to be created with empty content name,
   // component, ufrag and password.
   RTC_DCHECK(ice_ufrag.empty() == ice_pwd.empty());
 }
 
 void PortAllocator::SetConfiguration(
     const ServerAddresses& stun_servers,
     const std::vector<RelayServerConfig>& turn_servers,
-    int candidate_pool_size) {
+    int candidate_pool_size,
+    bool prune_turn_ports) {
   bool ice_servers_changed =
       (stun_servers != stun_servers_ || turn_servers != turn_servers_);
   stun_servers_ = stun_servers;
   turn_servers_ = turn_servers;
+  prune_turn_ports_ = prune_turn_ports;
 
   // If ICE servers changed, throw away any existing pooled sessions and create
   // new ones.
   if (ice_servers_changed) {
     pooled_sessions_.clear();
     allocated_pooled_session_count_ = 0;
   }
 
   // If |size| is less than the number of allocated sessions, get rid of the
   // extras.
@@ skipping 48 matching lines @@
 }
 
 const PortAllocatorSession* PortAllocator::GetPooledSession() const {
   if (pooled_sessions_.empty()) {
     return nullptr;
   }
   return pooled_sessions_.front().get();
 }
 
 }  // namespace cricket