[Merge] lp:~mitya57/metacity/3.12.0 into lp:~ubuntu-desktop/metacity/ubuntu

[Robert Ancell]

Looks good. We need to check this version works fine with Ubiquity, in particular the "Compositing manager is enabled by default now" change.
-- 
https://code.launchpad.net/~mitya57/metacity/3.12.0/+merge/226573
Your team Ubuntu Development Team is requested to review the proposed merge of lp:~mitya57/metacity/3.12.0 into lp:~ubuntu-desktop/metacity/ubuntu.