This patch removes the Page.setBlockedURLs method. The
functionality is trivially implementable with the request
interception (see examples/loadurlwithoutcss.js).
Fixes#1.
This patch implements Puppeteer's Page.setBlockedURLs method.
This is a less agile alternative to the phantom's request.abort()
api.
This patch also adds a loadurlwithoutcss.js example re-implementation
to illustrate the usage of Page.setBlockedURLs.