am c4d5d026: Add new window manager type for a hacking second-level media surface.

Merge commit 'c4d5d02667af6989a3121072871f6a4b1e68b594'

* commit 'c4d5d02667af6989a3121072871f6a4b1e68b594':
  Add new window manager type for a hacking second-level media surface.