doorkeeper: native_redirect_uri is not a valid redirect_uri in doorkeeper 4.4.1

Steps to reproduce

After generating a grant token, attempt to get the corresponding access token like the following. The important keys are the grant_type and redirect_uri.

    response = page.driver.post(token_url,
      code: access_grant_token,
      client_id: application.uid,
      client_secret: application.secret,
      redirect_uri: "urn:ietf:wg:oauth:2.0:oob",
      grant_type: "authorization_code"
    )

We happen to be using capybara in this test, but it’s just an HTTP POST.

Expected behavior

With doorkeeper 4.2.6, we get the access code in the response body, as expected.

Actual behavior

With doorkeeper 4.4.1, we get this error: {“error”:“invalid_grant”,“error_description”:“The provided authorization grant is invalid, expired, revoked, does not match the redirection URI used in the authorization request, or was issued to another client.”}

I believe this is happening because this line of code which is in master does not exist in version 4.4.1.

https://github.com/doorkeeper-gem/doorkeeper/blob/master/lib/doorkeeper/oauth/helpers/uri_checker.rb#L6