Backed out 1 changesets because the gecko part (bug 1420117) has to be backed out for the mochitests r=backout on a CLOSED TREE

Backed out changeset baada68cad47

Backs out https://github.com/servo/servo/pull/19441
This commit is contained in:
Gecko Backout 2017-12-05 00:18:35 +00:00 committed by moz-servo-sync
parent eed3adc957
commit 25436276ae
5 changed files with 846 additions and 344 deletions

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