tree ee5e4c2fa1bc5e52b7c071ddfae97fac9fa24b36
parent 1d7b3bb1fcab6bd3e2b51394e9e66fa86c61d333
author Chong Zhang <chz@google.com> 1435607499 -0700
committer Chong Zhang <chz@google.com> 1435607499 -0700

ignore buffers that's already removed

bug: 22005018
Change-Id: I892a0fe77519d5fb996bcb4cc95e0d10e859000c