Add PeerConnection IsClosed check.

webrtc/api/peerconnectionfactory.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 141 matching lines @@
   channel_manager_.reset(new cricket::ChannelManager(
       media_engine, worker_thread_, network_thread_));
 
   channel_manager_->SetVideoRtxEnabled(true);
   if (!channel_manager_->Init()) {
     return false;
   }
 
   return true;
 }
-

[Taylor Brandstetter, 2016/06/21 23:50:02]

Was this line deleted on purpose?

 rtc::scoped_refptr<AudioSourceInterface>
 PeerConnectionFactory::CreateAudioSource(
     const MediaConstraintsInterface* constraints) {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   rtc::scoped_refptr<LocalAudioSource> source(
       LocalAudioSource::Create(options_, constraints));
   return source;
 }
 
 rtc::scoped_refptr<AudioSourceInterface>
@@ skipping 120 matching lines @@
   return AudioTrackProxy::Create(signaling_thread_, track);
 }
 
 webrtc::MediaControllerInterface* PeerConnectionFactory::CreateMediaController(
     const cricket::MediaConfig& config) const {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   return MediaControllerInterface::Create(config, worker_thread_,
                                           channel_manager_.get());
 }
 
+cricket::TransportController* PeerConnectionFactory::CreateTransportController(
+    cricket::PortAllocator* port_allocator) {
+  RTC_DCHECK(signaling_thread_->IsCurrent());
+  return new cricket::TransportController(signaling_thread_, network_thread_,
+                                          port_allocator);
+}
+
 rtc::Thread* PeerConnectionFactory::signaling_thread() {
   // This method can be called on a different thread when the factory is
   // created in CreatePeerConnectionFactory().
   return signaling_thread_;
 }
 
 rtc::Thread* PeerConnectionFactory::worker_thread() {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   return worker_thread_;
 }
 
 rtc::Thread* PeerConnectionFactory::network_thread() {
   return network_thread_;
 }
 
 cricket::MediaEngineInterface* PeerConnectionFactory::CreateMediaEngine_w() {
   ASSERT(worker_thread_ == rtc::Thread::Current());
   return cricket::WebRtcMediaEngineFactory::Create(
       default_adm_.get(), video_encoder_factory_.get(),
       video_decoder_factory_.get());
 }
 
 }  // namespace webrtc