Add 'Blink' as detectable rendering engine

[brianchirls]

Chrome has been off WebKit and using its own fork Blink for some time now, since v28.

I understand there are two ways to detect Blink, though I'm not sure how reliable they are:

• /Chrome\/[0-9\.]+/ - see MDN
• /WebKit\/537\.36/ - This one mostly seems to check out, per this Chrome Version History, except for Chrome 27, which actually used WebKit 537.36.

It's worth mentioning that Chrome on iOS still uses WebKit.

[brianchirls]

It looks like the version number for Blink never progresses beyond 537.36, so it might make sense to just report whatever the Chrome version number is.

[mrkishi]

What about reporting Chrome >= 28 as Blink?

Perhaps something along these lines:

[/(chrome)\/((?:2[89]\.|[3-9]\d\.|\d{3}\.)[\w\.]+)/i, [[NAME, 'Blink'], [VERSION]]

I think it'd work fine for most Chromium-based browsers, too.

[AnandChowdhary]

I agree. Most active Chrome versions use Blink, not WebKit. Other user agent parsing libraries report it as Blink as well, I think we should be consistent.