Propogate network-worker thread split to api

webrtc/sdk/objc/Framework/Classes/RTCPeerConnectionFactory.mm

 /*
  *  Copyright 2015 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.
  */
 
 #import "RTCPeerConnectionFactory+Private.h"
 
 #import "NSString+StdString.h"
 #if defined(WEBRTC_IOS)
 #import "RTCAVFoundationVideoSource+Private.h"
 #endif
 #import "RTCAudioTrack+Private.h"
 #import "RTCMediaStream+Private.h"
 #import "RTCPeerConnection+Private.h"
 #import "RTCVideoSource+Private.h"
 #import "RTCVideoTrack+Private.h"
 
 #include <memory>
 
 @implementation RTCPeerConnectionFactory {
+  std::unique_ptr<rtc::Thread> _networkThread;
+  std::unique_ptr<rtc::Thread> _workerThread;
   std::unique_ptr<rtc::Thread> _signalingThread;
-  std::unique_ptr<rtc::Thread> _workerThread;
 }
 
 @synthesize nativeFactory = _nativeFactory;
 
 - (instancetype)init {
   if ((self = [super init])) {
-    _signalingThread.reset(new rtc::Thread());
-    BOOL result = _signalingThread->Start();
-    NSAssert(result, @"Failed to start signaling thread.");
-    _workerThread.reset(new rtc::Thread());
+    _networkThread = rtc::Thread::CreateWithSocketServer();
+    BOOL result = _networkThread->Start();
+    NSAssert(result, @"Failed to start network thread.");
+
+    _workerThread = rtc::Thread::Create();
     result = _workerThread->Start();
     NSAssert(result, @"Failed to start worker thread.");
 
+    _signalingThread = rtc::Thread::Create();
+    result = _signalingThread->Start();
+    NSAssert(result, @"Failed to start signaling thread.");
+
     _nativeFactory = webrtc::CreatePeerConnectionFactory(
-        _workerThread.get(), _signalingThread.get(), nullptr, nullptr, nullptr);
+        _networkThread.get(), _workerThread.get(), _signalingThread.get(),
+        nullptr, nullptr, nullptr);
     NSAssert(_nativeFactory, @"Failed to initialize PeerConnectionFactory!");
   }
   return self;
 }
 
 - (RTCAVFoundationVideoSource *)avFoundationVideoSourceWithConstraints:
     (nullable RTCMediaConstraints *)constraints {
 #if defined(WEBRTC_IOS)
   return [[RTCAVFoundationVideoSource alloc] initWithFactory:self
                                                  constraints:constraints];
@@ skipping 25 matching lines @@
     (RTCMediaConstraints *)constraints
                                               delegate:
     (nullable id<RTCPeerConnectionDelegate>)delegate {
   return [[RTCPeerConnection alloc] initWithFactory:self
                                       configuration:configuration
                                         constraints:constraints
                                            delegate:delegate];
 }
 
 @end