tree 6a9f8573f9d82eaf84538e386332a5119d5244b8
parent 8a4e6a90e6b7edf73fa0d79dd5b439f8e52eb9f0
author Corey Tabaka <eieio@google.com> 1493164064 -0700
committer Corey Tabaka <eieio@google.com> 1493937394 -0700

Return pdx::Status<T> from BufferHubQueue::Dequeue.

Switch to using Status<T> to return buffers or meaningful errors
from BufferHubQueue::Dequeue. This enables determining whether an
error is normal (e.g. timeout) or abnormal (e.g. disconnect).

Bug: 36401174
Test: buffer_hub_queue-test passes.
Change-Id: Ifef5f737a5e737b70d19bdbffd7544a993438e1c