Continue reducing callers to getCallsign()
Summary: Ref T4245. More of the same, just narrowing down the easy cases.
Test Plan:
- Called diffusion.querycommit.
- Browsed branches.
- Browsed repository.
- Browsed directory.
- Searched for stuff.
- Viewed a commit.
- Viewed a file diff.
- Edited a commit.
- Viewed history.
- Viewed tags.
- Viewed push log.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4245
Differential Revision: https://secure.phabricator.com/D14929