Add DatagramClientSocket::BindToDefaultNetwork(),GetBoundNetwork()

net/udp/udp_client_socket.h

Index: net/udp/udp_client_socket.h
diff --git a/net/udp/udp_client_socket.h b/net/udp/udp_client_socket.h
index 60fa720271a006acbe44118052990a482b5833b5..c0bcddaaef479f031baecb631cd37440c99d9004 100644
--- a/net/udp/udp_client_socket.h
+++ b/net/udp/udp_client_socket.h
@@ -25,6 +25,8 @@ class NET_EXPORT_PRIVATE UDPClientSocket : public DatagramClientSocket {
 
   // DatagramClientSocket implementation.
   int BindToNetwork(NetworkChangeNotifier::NetworkHandle network) override;
+  int BindToDefaultNetwork() override;
+  NetworkChangeNotifier::NetworkHandle GetBoundNetwork() override;
   int Connect(const IPEndPoint& address) override;
   int Read(IOBuffer* buf,
            int buf_len,
@@ -47,6 +49,7 @@ class NET_EXPORT_PRIVATE UDPClientSocket : public DatagramClientSocket {
 
  private:
   UDPSocket socket_;
+  NetworkChangeNotifier::NetworkHandle network_;
   DISALLOW_COPY_AND_ASSIGN(UDPClientSocket);
 };