tree 61d3e80272c6f30d978d829c2fcfc68fb2677dc4
parent 0fc32d93d3c8dec6a4e6a214188f41caf03267d8
author Eric Boren <borenet@google.com> 1566408883 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1566409952 +0000

[repograph] More tweaks needed for GitSync

- RepoImpl.UpdateCallback needs added and removed commit lists (unused
  by current implementations but more sensible to make the change in
  this CL.
- Deduplicate branch maps in UpdateBranchInfo. This dramatically reduces
  memory usage, but we can no longer allow clients to edit them. I don't
  think this was ever done anyway.
- Make commit hashes deterministic in tests for easier debugging.

Change-Id: Ic2fc93bcf820c08d21403e0684c569327e6b938a
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/235459
Commit-Queue: Eric Boren <borenet@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>