{
  skiastatus: {
    urls: ['https://status.skia.org'],
    method: 'GET',
    expected: [200],
    body: '',
    mimetype: '',
  },
  skiastatus_json: {
    urls: ['https://status.skia.org/twirp/status.StatusService/GetIncrementalCommits'],
    method: 'POST',
    expected: [200],
    body: '',
    mimetype: 'application/json',
    responsetest: 'validJSON',
  },
}


Add required GetIncrementalCommits body to prober.
{
  skiastatus: {
    urls: ['https://status.skia.org'],
    method: 'GET',
    expected: [200],
    body: '',
    mimetype: '',
  },
  skiastatus_json: {
    urls: ['https://status.skia.org/twirp/status.StatusService/GetIncrementalCommits'],
    method: 'POST',
    expected: [200],
    body: '{"repo_path": "skia"}',
    mimetype: 'application/json',
    responsetest: 'validJSON',
  },
}