Support tls-server-end-point channel bindings for HTTP authentication.

net/http/http_auth_gssapi_posix.h

Index: net/http/http_auth_gssapi_posix.h
diff --git a/net/http/http_auth_gssapi_posix.h b/net/http/http_auth_gssapi_posix.h
index cf4dcd50f351b2c2fb5ffa0084bd3ffad3718f10..6a657616dcc949523ca5b582d9c597f736218d58 100644
--- a/net/http/http_auth_gssapi_posix.h
+++ b/net/http/http_auth_gssapi_posix.h
@@ -272,6 +272,7 @@ class NET_EXPORT_PRIVATE HttpAuthGSSAPI {
   // credentials are used instead.
   int GenerateAuthToken(const AuthCredentials* credentials,
                         const std::string& spn,
+                        const std::string& channel_bindings,
                         std::string* auth_token,
                         const CompletionCallback& callback);
 
@@ -282,6 +283,7 @@ class NET_EXPORT_PRIVATE HttpAuthGSSAPI {
 
  private:
   int GetNextSecurityToken(const std::string& spn,
+                           const std::string& channel_bindings,
                            gss_buffer_t in_token,
                            gss_buffer_t out_token);