R1:2b13da88ceb9

Read synthetic inline comments from Harbormaster

Summary: Ref T8096. These are still reading out of the old diff property, but should read from Harbormaster instead.

Test Plan: {F698346}

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T8096

Differential Revision: https://secure.phabricator.com/D13847