D19544: Send blur/background contrast in device pixels

[Vlad Zagorodniy]

zzag accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R278 KWindowSystem

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D19544

To: davidedmundson, #kwin, zzag
Cc: zzag, kde-frameworks-devel, michaelh, ngraham, bruns