tree c44d12ee7e06966b6ac3ea5e1198c35753306a88
parent db338c2e907acb8a93d0519940a1c21125f6db1b
author Daichi Hirono <hirono@google.com> 1455145192 -0800
committer Daichi Hirono <hirono@google.com> 1455223555 -0800

Show specific error message for busy device.

When MTP device is busy (e.g. used by other application),
MtpDocumentsProvider cannot open the device. The CL introduces specific
error message for the case.

BUG=26694828

Change-Id: Iffee2e1c554e4089601186469ff0eac2fd04decd