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

webrtc/base/network.cc

Index: webrtc/base/network.cc
diff --git a/webrtc/base/network.cc b/webrtc/base/network.cc
index 488c475137a2ee8d7ddbea1fa2ace59175cc3f36..6d0f2de9b882c190cc30c1dfebf617774883ece5 100644
--- a/webrtc/base/network.cc
+++ b/webrtc/base/network.cc
@@ -731,7 +731,7 @@ void BasicNetworkManager::StartNetworkMonitor() {
   if (factory == nullptr) {
     return;
   }
-  network_monitor_.reset(factory->CreateNetworkMonitor());
+  network_monitor_ = factory->GetOrCreateNetworkMonitor();

[pthatcher1, 2016/01/14 20:07:24]

Why is it necessary for the factory to own the network monitor?

[honghaiz3, 2016/01/15 01:00:38]

It is a good point. I revised it to own the monitor only at the network manager.

   if (!network_monitor_) {
     return;
   }
@@ -745,7 +745,6 @@ void BasicNetworkManager::StopNetworkMonitor() {
     return;
   }
   network_monitor_->Stop();
-  network_monitor_.reset();
 }
 
 void BasicNetworkManager::OnMessage(Message* msg) {