Freeze "phriction.history" in favor of "phriction.content.search"

Summary: Depends on D19097. Ref T13077. Freeze the older method now that the newer one is available.

Test Plan: Viewed the older method's page and saw it frozen; called it to make sure I didn't break it by accident.

Maniphest Tasks: T13077

Differential Revision: https://secure.phabricator.com/D19098