Roll chromium to r494755 (#286)
Roll chromium to r494755 (#286)

Fixes #285.
brutalcrozt/puppeteer,elisherer/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer,puppeteer/puppeteer,GoogleChrome/puppeteer,michaelfward/puppeteer,brutalcrozt/puppeteer,GoogleChrome/puppeteer,a1ph/puppeteer,GoogleChrome/puppeteer,elisherer/puppeteer,ianchn/puppeteer,puppeteer/puppeteer,michaelfward/puppeteer,ianchn/puppeteer,a1ph/puppeteer