Cannot work in chrome headless browser
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
options = Options()
options.binary_location = '/usr/bin/google-chrome'
options.add_argument('--headless')
options.add_argument('--window-size=1280,1024')
options.add_argument('--no-sandbox')
driver = webdriver.Chrome('/root/bin/chromedriver', chrome_options=options)
driver.get('http://vraku.com:8080/n20.html')  #  mine.html  20% cpu use 
sleep 10s
driver.save_screenshot('/tmp/screenshot.png')
![screenshot](https://user-images.githubusercontent.com/42635299/50925122-b7a0e100-1494-11e9-8484-9216f3b12d99.png)