Flash does not work on wayland, it loads/runs on backend but video data is not visible. We better to disable Flash completely when Wayland backend is active.

Pushed by nbeleuzu@mozilla.com:
https://hg.mozilla.org/integration/autoland/rev/d1615ffd338f
[Wayland] Disable Flash on Wayland backend, r=jmathies

Backed out changeset d1615ffd338f (Bug 1548475) for xpcshell failures CLOSED TREE

failure: https://treeherder.mozilla.org/#/jobs?repo=autoland&resultStatus=testfailed%2Cbusted%2Cexception&classifiedState=unclassified&fromchange=035696395109f035a7c314c9f759843a364dc01f&selectedJob=245612264

Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=245612264&repo=autoland&lineNumber=2134

I'll fix that.

The failure may be caused by Bug 1550658.

There's a r+ patch which didn't land and no activity in this bug for 2 weeks.
:stransky, could you have a look please?
For more information, please visit auto_nag documentation.

I need to fix the try issues before land.

https://treeherder.mozilla.org/#/jobs?repo=try&revision=eba8994596ba913b628ed2a944983ca0e3eec77a

Pushed by btara@mozilla.com:
https://hg.mozilla.org/integration/mozilla-inbound/rev/f7ebf8b342e1
[Wayland] Disable Flash on Wayland backend, r=glandium

https://hg.mozilla.org/mozilla-central/rev/f7ebf8b342e1