Refactor sharedmem API: remove Key module type from public signature
Refactor sharedmem API: remove Key module type from public signature

Reviewed By: jbrown215

Differential Revision: D24571998

fbshipit-source-id: bcf5cd71196f737777b6290d752ad33870ca9ba1

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow