fix warning on chrome
fix warning on chrome

mattbrictson/xray-rails,mattbrictson/xray-rails,brentd/xray-rails,fukayatsu/xray-rails,mattbrictson/xray-rails,brentd/xray-rails,fukayatsu/xray-rails,mattbrictson/xray-rails,fukayatsu/xray-rails,brentd/xray-rails,brentd/xray-rails,fukayatsu/xray-rails