Bug 1523495 - Adjust blur target sizes to avoid down-scaling artifacts. r=gw
Bug 1523495 - Adjust blur target sizes to avoid down-scaling artifacts. r=gw

Differential Revision: https://phabricator.services.mozilla.com/D18855

[wrupdater] From https://hg.mozilla.org/mozilla-central/rev/782ec3fc98e08e51b59c82d8a756fd0d6ec1b649

servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender