We currently use WR accelerated filters for <feGaussianBlur> SVG filters if the x and y radius are equal. It seems like it shouldn't be too much work to generalize this to different x and y radii.
Bug 1637209 has a testcase that would be improved as a result.

Pretty straight forward, mostly just plumbing stuff through.

Backed out changeset 26ff1a25028d (bug 1656711) for Webrender build bustages

Log:
https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=311796301&repo=autoland&lineNumber=13232

Push with failures:
https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&selectedTaskRun=WozMYRw_T1isIzu6UWhLUg.0&revision=26ff1a25028d7c202d4ab56009b004d1425aaac3

Backout:
https://hg.mozilla.org/integration/autoland/rev/e0df0cffb3883937384e769dcaa228d1097c388c

Backed out changeset fed45fbadc26 (bug 1656711) for webrender build bustage

Log:
https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=311796817&repo=autoland&lineNumber=13335

Push with failures:
https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&revision=fed45fbadc26ca8595d6ba86f4b7aba2f5ed6708

Backout:
https://hg.mozilla.org/integration/autoland/rev/dea8656d5ca3eb2766cfd4744ca2b351b9435dc2

https://hg.mozilla.org/mozilla-central/rev/0da3036d0890

Backout got merged: https://hg.mozilla.org/mozilla-central/rev/9d82ac6aafd9

Hi Timothy, it seems the backout helped with bug 1657558. Can you confirm?

I still suspect the crashes were unrelated and would have gone away without the backout. So I'm going to reland the patch and see if the crashes return. But I'll wait until after the merge next week.

https://hg.mozilla.org/mozilla-central/rev/beeed787f909