Auto merge of #18320 - upsuper:counter-style-clone, r=heycam

Rewrite CounterStyleOrNone::from_gecko_value to use fewer binding functions

This is the Servo side change of [bug 1393189](https://bugzilla.mozilla.org/show_bug.cgi?id=1393189).

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bors-servo 2017-08-31 01:31:52 -05:00 committed by GitHub
commit 12ca7d9e96
6 changed files with 1442 additions and 1329 deletions

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