Plumbing for TCP FastOpen for SSL sockets.

net/socket/stream_socket.h

Index: net/socket/stream_socket.h
diff --git a/net/socket/stream_socket.h b/net/socket/stream_socket.h
index 72088103a3d7669f30dd3151da55b975f6f4245c..7631e126fc50d724996e31cc38b5f550a447e1e6 100644
--- a/net/socket/stream_socket.h
+++ b/net/socket/stream_socket.h
@@ -75,10 +75,15 @@ class NET_EXPORT_PRIVATE StreamSocket : public Socket {
   // Write() methods had been called, not the underlying transport's.
   virtual bool WasEverUsed() const = 0;
 
+  // TODO(jri): Clean up -- remove this method.
   // Returns true if the underlying transport socket is using TCP FastOpen.
   // TCP FastOpen is an experiment with sending data in the TCP SYN packet.
   virtual bool UsingTCPFastOpen() const = 0;
 
+  // TODO(jri): Clean up -- rename to a more general EnableAutoConnectOnWrite.
+  // Enables use of TCP FastOpen for the underlying transport socket.
+  virtual void EnableTCPFastOpenIfSupported() {}
+
   // Returns true if NPN was negotiated during the connection of this socket.
   virtual bool WasNpnNegotiated() const = 0;