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

webrtc/base/physicalsocketserver.h

Index: webrtc/base/physicalsocketserver.h
diff --git a/webrtc/base/physicalsocketserver.h b/webrtc/base/physicalsocketserver.h
index ae1f10f596d8b66b49ab5372b1ad4c52186c4321..9ad3c793ffa945c4ee92a00668499fd866c54af9 100644
--- a/webrtc/base/physicalsocketserver.h
+++ b/webrtc/base/physicalsocketserver.h
@@ -129,6 +129,7 @@ class PhysicalSocket : public AsyncSocket, public sigslot::has_slots<> {
 
   int Bind(const SocketAddress& bind_addr) override;
   int Connect(const SocketAddress& addr) override;
+  int BindToNetwork(NetworkHandle network) override;
 
   int GetError() const override;
   void SetError(int error) override;