Spec: https://html.spec.whatwg.org/multipage/scripting.html#filters

We'd like to ship this in Blink in Chrome 52, which in practice means enabling it by May 6th.

Blink Intent-to-Ship: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/Jhwj8QAYaFY Mozilla Intent to Implement and Ship: https://groups.google.com/forum/#!topic/mozilla.dev.platform/AKVp1cqQYHQ

This spec has been discussed on the whatwg mailing list: https://lists.w3.org/Archives/Public/public-whatwg-archive/2014Sep/0110.html

cc @mstange @junov