Merge "Destroy saved surfaces if one of the last visible windows gets removed"...
Merge "Destroy saved surfaces if one of the last visible windows gets removed" into nyc-dev am: 15818e11
am: b56ea680
* commit 'b56ea680':
Destroy saved surfaces if one of the last visible windows gets removed
Change-Id: I7860d2c6c4862dfbac060c76e74ca371435906e2