Support for the ALPN extension of the TLS protocol for Client and Server

dart/runtime/bin/secure_socket.h

Index: dart/runtime/bin/secure_socket.h
diff --git a/dart/runtime/bin/secure_socket.h b/dart/runtime/bin/secure_socket.h
index ba8eb4fdd2920c450c74c6879bb1680306e90a69..0bce75033105a853828093d6934460b0f615b82a 100644
--- a/dart/runtime/bin/secure_socket.h
+++ b/dart/runtime/bin/secure_socket.h
@@ -61,9 +61,12 @@ class SSLFilter {
                const char* certificate_name,
                bool request_client_certificate,
                bool require_client_certificate,
-               bool send_client_certificate);
+               bool send_client_certificate,
+               uint8_t *protocols,
+               intptr_t protocols_len);
   void Destroy();
   void Handshake();
+  void GetSelectedProtocol(Dart_NativeArguments args);
   void Renegotiate(bool use_session_cache,
                    bool request_client_certificate,
                    bool require_client_certificate);