R1:a4b281aa2916

Fix Phame handling of `$request`

Summary: Fixes T6386. I missed this callsite in D10698.

Test Plan: Loaded local domained blog, no fatal.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T6386

Differential Revision: https://secure.phabricator.com/D10744