tree ef3139aee1cfc05ad406577616898829ba0e5dc5
parent 01a46f4e257010a98eedfc6d0e0c2eca570ed724
author Daichi Hirono <hirono@google.com> 1445930297 +0900
committer Daichi Hirono <hirono@google.com> 1446431447 +0900

Implement ID mapping for root documents.

MTP identifiers like object handle is unstable over MTP sessions.  The
CL introduce two methods to MtpDatabase that enables the provider to
remap exisitng document ID with new MTP identifiers when the provider
reopen the MTP session.

 * MtpDatabase#clearMtpIdentifier invalidates old MTP identifiers
 * MtpDatabase#resolveRootDocuments remaps invalidated documents with
   new MTP identifier.

BUG=25162822

Change-Id: Iadb668ae5932da81aba2b2731d0d185da5656f16