Bind a socket to a network if the network handle is set.

webrtc/p2p/client/basicportallocator.cc

Index: webrtc/p2p/client/basicportallocator.cc
diff --git a/webrtc/p2p/client/basicportallocator.cc b/webrtc/p2p/client/basicportallocator.cc
index e45d2c8f0f30ffec271d1804808c9de9d11cbecc..4d983d44af54c860b75af6796423124a927a6d11 100644
--- a/webrtc/p2p/client/basicportallocator.cc
+++ b/webrtc/p2p/client/basicportallocator.cc
@@ -726,9 +726,9 @@ AllocationSequence::AllocationSequence(BasicPortAllocatorSession* session,
 
 bool AllocationSequence::Init() {
   if (IsFlagSet(PORTALLOCATOR_ENABLE_SHARED_SOCKET)) {
-    udp_socket_.reset(session_->socket_factory()->CreateUdpSocket(
+    udp_socket_.reset(session_->socket_factory()->CreateUdpSocketOnNetwork(
         rtc::SocketAddress(ip_, 0), session_->allocator()->min_port(),
-        session_->allocator()->max_port()));
+        session_->allocator()->max_port(), network_));
     if (udp_socket_) {
       udp_socket_->SignalReadPacket.connect(
           this, &AllocationSequence::OnReadPacket);