tree 85c40ec5e730b5e09207ade639ab688162bbd0ff
parent 7b0181cea99a341d2e6f5d099ca635d4b127b3fa
author Chong Zhang <chz@google.com> 1445971104 -0700
committer Chong Zhang <chz@google.com> 1446076768 -0700

Several fixes for saved surface

- Do not save if the exiting app is no longer top of task

- Mark saved surfaces as invalid when recoving memory, they will
  be reclaimed if they're hidden.

- Save surface when visibility changed to GONE

- Discard saved surface after rotation

- Misc minor fixes and clean-up

bug: 19940527

Change-Id: I5760c7a7b4bf37ef6bdd39cae793a97cf7579429