tree ff0afee69d9951264e1a1847047797b84f6fde1e
parent cc50d35999d7b3030ab094499c8454d1576a2e02
author Stephen Li <stephenli@google.com> 1494368769 -0700
committer Stephen Li <stephenli@google.com> 1495237615 -0700

Use tags instead of votes to denote automerger-created CLs.

Instead of using votes (which can be tampered with, and introduce
extra complexity w.r.t. what shows up in the UI), we instead use
tags. These tags ensure that we can mark a patchset as
automerger-created without letting the user change that fact.

Change-Id: I41bf0a9cc3dffbb5462b9d8b5dfcc5bbe150f8a2