When batched deletions via the job queue were added in Ie800fb5a, the
way this was reported caused ApiDelete to report an error. Instead it
should report success with appropriate signaling to the client.
Bug: T212356
Change-Id: I1ef66277e988572c6720cf3e3cb36b18530746b4
Still missing a test for file deletion, because I didn't figure out a
simple way to create a file page that I can test on.
Change-Id: I276e84b4f7777e5dd5be5520e572b9b9bb0c0633