tree ed910a03d6346543a95dd86c48c40c8ee40edeac
parent 2058042a356c4de0b991db34354f0eaf527aa032
author Guang Zhu <guangzhu@google.com> 1341337983 -0700
committer Guang Zhu <guangzhu@google.com> 1341338139 -0700

clean up tmp files

screenshot and xml dumps are pulled from device and stored into
tmp directories, this leaves a lot of traces behind until the
system reboots. we now keep track of temp directories created
and delete them when the app exits.

Change-Id: I3190dd93c3b413afc0a513eaedf11409f3e5efa8