Plumbing for TCP FastOpen for SSL sockets.

net/socket/tcp_socket_libevent.h

Index: net/socket/tcp_socket_libevent.h
diff --git a/net/socket/tcp_socket_libevent.h b/net/socket/tcp_socket_libevent.h
index 0335c9ea2dea0587ad6ff29421f3a2b3176363dd..89b6a22bdd08d24b05529b6a9f2031351098d256 100644
--- a/net/socket/tcp_socket_libevent.h
+++ b/net/socket/tcp_socket_libevent.h
@@ -65,7 +65,10 @@ class NET_EXPORT TCPSocketLibevent {
 
   void Close();
 
+  // Setter/Getter methods for TCP FastOpen socket option.
   bool UsingTCPFastOpen() const;
+  void EnableTCPFastOpenIfSupported();
+
   bool IsValid() const;
 
   // Marks the start/end of a series of connect attempts for logging purpose.
@@ -168,11 +171,10 @@ class NET_EXPORT TCPSocketLibevent {
   scoped_ptr<SocketLibevent> accept_socket_;
 
   // Enables experimental TCP FastOpen option.
-  const bool use_tcp_fastopen_;
+  bool use_tcp_fastopen_;
 
   // True when TCP FastOpen is in use and we have done the connect.
   bool tcp_fastopen_connected_;
-
   FastOpenStatus fast_open_status_;
 
   bool logging_multiple_connect_attempts_;