Add a SetDoNotFragment() method to DatagramSocket, and call this for

net/socket/tcp_client_socket.h

Index: net/socket/tcp_client_socket.h
diff --git a/net/socket/tcp_client_socket.h b/net/socket/tcp_client_socket.h
index bf41545d180e3139783aaf60f722cdfc4848aa15..5702afbe2277b95c86a59233faaf195178a8e910 100644
--- a/net/socket/tcp_client_socket.h
+++ b/net/socket/tcp_client_socket.h
@@ -72,6 +72,7 @@ class NET_EXPORT TCPClientSocket : public StreamSocket {
             const CompletionCallback& callback) override;
   int SetReceiveBufferSize(int32_t size) override;
   int SetSendBufferSize(int32_t size) override;
+  int SetDoNotFragment(bool do_not_fragment) override;
 
   virtual bool SetKeepAlive(bool enable, int delay);
   virtual bool SetNoDelay(bool no_delay);