Patch chrome.dns.resolve to support canonical_name flag

[jonathansampson]

Description

Chromium presently supports IP address resolution:

chrome.dns.resolve('www.brave.com', response => {
  console.log(response.address)
})

In order to combat CNAME-trackers, uBO and others are evaluating Firefox's implementation of the DNS API, which supports passing optional flags:

chrome.dns.resolve('www.brave.com', ['canonical_name']).then( response => {
  console.log(response.canonicalName)
})

There are many other optional flags, but CNAME appears to be the most necessary for now.

Note: Chromium expects a callback as the second argument. Firefox, however, returns a promise.

[ryanbr]

Related Ubo CNAME issues: easylist/easylist#5039