tree 4597760a3ecd0a393674f0daf3f8c6a0a87f1c95
parent 001c686a4735fa856b361ff67e0bcbd873b89a06
author Ambre Williams <ambre@google.com> 1560874988 +0000
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1560874988 +0000

[callback] add comment describing EnsureCalled

TEST=comment only

Change-Id: Ied1bd6be9b71d19efe39f9c6c34a7f7aaefc89b4