.entries() vs. the web

[Oliver Hunt]

It turns out there are a number of sites (such as mobile.twitter.com) that are property detecting .entries on objects, and that means that they're breaking when Array.prototype.entries is provided.

We're removing it from JSC now, until we can find a way to expose it without causing site breakage, although this does seem like fixing it would require bringing back the awful "pretend that you're undefined" horror.

--Oliver

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