tree f3e67ac745ef835da54984532b529ea9dddd3607
parent 5e491c91e85998cbb42d796aec507431b05068ba
author Daichi Hirono <hirono@google.com> 1439802083 +0900
committer Daichi Hirono <hirono@google.com> 1439803053 +0900

Handle null value returned by MtpDevice#getRoots.

BUG=23169303

Change-Id: I9602dda01f3b8919a471c1f4c88acdd19f391684