Summary:
Ref T3496. Currently, we call loadAssets() on each revision table, which invokes a new revision query and a pile of subqueries.
Instead, add `needFlags()` and `needDrafts()` to `RevisionQuery`. Some day these could perhaps be more generic.
Test Plan:
- Viewed home, differential, etc., no longer saw 9203809238 queries being run for no reason.
- Drafts and flags still appear properly.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T3496
Differential Revision: https://secure.phabricator.com/D8277
50ed42761c