Propogate network-worker thread split to api

webrtc/api/peerconnectionfactory.h

Index: webrtc/api/peerconnectionfactory.h
diff --git a/webrtc/api/peerconnectionfactory.h b/webrtc/api/peerconnectionfactory.h
index f03af090c0c88f386571f49c2d03bc7d4b3ef6fb..bd2ec9cecafc4f82c684005b345467179aa236ce 100644
--- a/webrtc/api/peerconnectionfactory.h
+++ b/webrtc/api/peerconnectionfactory.h
@@ -95,11 +95,13 @@ class PeerConnectionFactory : public PeerConnectionFactoryInterface {
       const cricket::MediaConfig& config) const;
   virtual rtc::Thread* signaling_thread();
   virtual rtc::Thread* worker_thread();
+  virtual rtc::Thread* network_thread();
   const Options& options() const { return options_; }
 
  protected:
   PeerConnectionFactory();
   PeerConnectionFactory(
+      rtc::Thread* network_thread,
       rtc::Thread* worker_thread,
       rtc::Thread* signaling_thread,
       AudioDeviceModule* default_adm,
@@ -112,8 +114,9 @@ class PeerConnectionFactory : public PeerConnectionFactoryInterface {
 
   bool owns_ptrs_;
   bool wraps_current_thread_;
-  rtc::Thread* signaling_thread_;
+  rtc::Thread* network_thread_;
   rtc::Thread* worker_thread_;
+  rtc::Thread* signaling_thread_;
   Options options_;
   // External Audio device used for audio playback.
   rtc::scoped_refptr<AudioDeviceModule> default_adm_;