tree ba1ccfbfd330e57f7598eb6ad7d3a8a53482fbdb
parent c08c15ef5b3102d582ccd9295c1222b0476f3aa1
author Andy Huang <ath@google.com> 1331092624 -0800
committer Andy Huang <ath@google.com> 1331146924 -0800

Flesh out attachment download details

Add columns to AttachmentColumns for the UI to initiate and
cancel downloads, and for providers to convey download progress.

Remove SYNCED column, as the joined-string representation of an
attachment contains "origin", which covers the same thing.

Remove ORIGIN_EXTRAS column, as the joined-string representation
already contains that info.

Change-Id: Id50ffbf07b867a1cd7e5fd40f171d45b556b197b