tree d9cd5b229b2df7db0885ab24ed30ded06d265208
parent 3bde32e68d201f2dda4a4847d2818c74b120cdbb
author keunyoung <keunyoung@google.com> 1412717176 -0700
committer keunyoung <keunyoung@google.com> 1412718384 -0700

ignore null TaskStack and continue layout for PRIVATE_PRESENTATION window

bug: 17677973
Change-Id: I2666a1c1cf8956e60d7261912da34d1999131eba