GitLab

- Make DocumentScanScanFunction a UIThreadExtensionFunction so that
  API -> DocumentScanInterface -> LorgnetteManagerClient runs on UI
  thread;
- Update DocumentScanInterface to use OnceCallback;

Bug: 966178
Change-Id: I0428299174dcd949ff06b2a17fb492aef0df7349
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1637874
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665685}